WEBVTT 00:00:00.000 --> 00:00:02.359 Welcome to the Deep Dive, where we take massive 00:00:02.359 --> 00:00:04.440 amounts of research and distill it down into 00:00:04.440 --> 00:00:07.000 the core knowledge you need to be truly informed. 00:00:07.379 --> 00:00:10.140 Today, we are taking a fascinating journey back 00:00:10.140 --> 00:00:12.599 to the 18th century. We're exploring the life 00:00:12.599 --> 00:00:15.339 of a man who, really, he achieved a singular, 00:00:15.419 --> 00:00:18.359 staggering feat. He gave the natural world a 00:00:18.359 --> 00:00:21.379 universal, consistent language. We are diving 00:00:21.379 --> 00:00:24.140 deep into Carl Linnaeus, or Carl von Linnaeus, 00:00:24.140 --> 00:00:27.859 after he was ennobled. A Swedish polymath who 00:00:27.859 --> 00:00:30.170 was revered by his contemporaries. I mean, they 00:00:30.170 --> 00:00:32.189 gave him these extraordinary titles. Oh, absolutely. 00:00:32.429 --> 00:00:34.750 Titles like Princeps Botanicorum, the Prince 00:00:34.750 --> 00:00:37.009 of Botanists, and even the Pliny of the North. 00:00:37.170 --> 00:00:39.350 And you probably know him as the father of modern 00:00:39.350 --> 00:00:42.880 taxonomy. But that title. It barely scratches 00:00:42.880 --> 00:00:45.020 the surface of his ambition, doesn't it? Not 00:00:45.020 --> 00:00:47.679 at all. He didn't just catalog life. He organized 00:00:47.679 --> 00:00:50.200 the very structure of biological communication 00:00:50.200 --> 00:00:53.439 that every scientist on Earth uses, even today. 00:00:53.659 --> 00:00:55.539 So our mission for you today is to give you a 00:00:55.539 --> 00:00:57.700 clear shortcut. We're going to go far beyond 00:00:57.700 --> 00:01:01.119 that dusty textbook summary of, you know, binomial 00:01:01.119 --> 00:01:03.210 nomenclature. We're digging into the dramatic 00:01:03.210 --> 00:01:05.930 biography, the near miss career as a cobbler, 00:01:06.049 --> 00:01:08.590 the really dangerous expeditions, the high stakes 00:01:08.590 --> 00:01:11.730 controversies and this this explosive three year 00:01:11.730 --> 00:01:14.310 period that just transformed him. From this obscure 00:01:14.310 --> 00:01:18.049 Swedish curate's son into a defining figure of 00:01:18.049 --> 00:01:20.209 the Enlightenment. And this was all before his 00:01:20.209 --> 00:01:24.379 death in 1778. The source material. really paints 00:01:24.379 --> 00:01:27.420 a picture of a man driven by an almost frantic, 00:01:27.459 --> 00:01:31.340 relentless need to impose order on chaos. And 00:01:31.340 --> 00:01:33.680 you can see that foundational connection to nature 00:01:33.680 --> 00:01:36.719 literally encoded in his family name. It's one 00:01:36.719 --> 00:01:38.859 of those perfect biographical details you almost 00:01:38.859 --> 00:01:41.099 wouldn't believe. Yeah. Before Linnaeus, his 00:01:41.099 --> 00:01:43.900 family used the traditional Scandinavian patronymic 00:01:43.900 --> 00:01:47.219 system names, like son of Nils. Right. But when 00:01:47.219 --> 00:01:50.420 his father, Nils Ingemarsson, enrolled at Lund 00:01:50.420 --> 00:01:52.939 University, he needed a permanent family surname. 00:01:53.239 --> 00:01:55.400 So Nils looked around the family homestead in 00:01:55.400 --> 00:01:57.599 Smallland. Exactly. And on that property stood 00:01:57.599 --> 00:02:01.120 this massive, distinctive linden tree. The Swedish 00:02:01.120 --> 00:02:03.819 word for Linden is Lind, and from that, he just 00:02:03.819 --> 00:02:06.540 derived the Latinate surname Linnaeus. So the 00:02:06.540 --> 00:02:08.699 family's identity was literally rooted in a tree. 00:02:08.879 --> 00:02:11.719 It's the perfect foreshadowing for Carl's destiny, 00:02:12.000 --> 00:02:14.539 right from the very beginning. Okay, let's unpack 00:02:14.539 --> 00:02:17.039 this. That botanical connection wasn't just in 00:02:17.039 --> 00:02:19.340 the name, was it? It seems to have defined his 00:02:19.340 --> 00:02:22.639 entire, very curious childhood. It really did. 00:02:22.719 --> 00:02:25.120 If we look at his first two decades, I mean... 00:02:25.310 --> 00:02:28.229 Despite coming from this long line of peasants 00:02:28.229 --> 00:02:32.250 and priests, his path was anything but predetermined. 00:02:32.430 --> 00:02:36.069 Carl Nilsson Linnaeus was born in 1707 in Rochold, 00:02:36.229 --> 00:02:39.810 a small village in Småland, Sweden. His father, 00:02:39.949 --> 00:02:42.949 Nils, was a Lutheran minister, but also a serious 00:02:42.949 --> 00:02:45.770 amateur botanist. And he maintained a significant 00:02:45.770 --> 00:02:49.050 garden. So from infancy, Carl was just constantly 00:02:49.050 --> 00:02:51.810 exposed to the world of flora. And that exposure 00:02:51.810 --> 00:02:54.370 was incredibly personal. There's this genuinely... 00:02:54.780 --> 00:02:57.039 touching detail in the sources. Oh, the story 00:02:57.039 --> 00:02:58.919 about him as a child. Yeah, by all accounts, 00:02:59.020 --> 00:03:00.900 he was a difficult or, you know, temperamental 00:03:00.900 --> 00:03:03.740 child prone to fits of upset. But his mood could 00:03:03.740 --> 00:03:06.159 be calmed immediately and completely if he was 00:03:06.159 --> 00:03:08.669 simply given a flower. It sounds almost mythological, 00:03:08.830 --> 00:03:11.449 doesn't it? But it confirms this almost therapeutic, 00:03:11.629 --> 00:03:14.509 obsessive connection he had to plants years and 00:03:14.509 --> 00:03:16.909 years before he understood their scientific function. 00:03:17.150 --> 00:03:19.810 And his father encouraged it. He gave him his 00:03:19.810 --> 00:03:22.550 own small patch of earth to cultivate, labeling 00:03:22.550 --> 00:03:24.930 the plants, teaching Carl their name. He did. 00:03:25.110 --> 00:03:27.990 But that love for botany, unfortunately, did 00:03:27.990 --> 00:03:30.870 not translate to success in the classroom. Not 00:03:30.870 --> 00:03:32.840 at all. Quite the opposite. When he was sent 00:03:32.840 --> 00:03:35.120 to the lower grammar school at Vecchio, he was 00:03:35.120 --> 00:03:37.340 apparently an absolute disaster at traditional 00:03:37.340 --> 00:03:41.180 studies. Latin, rhetoric, theology. He just preferred 00:03:41.180 --> 00:03:43.560 to be absent. He'd be wandering the fields and 00:03:43.560 --> 00:03:46.060 forests collecting specimens rather than, you 00:03:46.060 --> 00:03:48.039 know, focusing on his lessons. And this created 00:03:48.039 --> 00:03:51.479 a genuine academic crisis. A huge crisis. His 00:03:51.479 --> 00:03:53.879 teachers were so deeply critical of his performance, 00:03:54.240 --> 00:03:57.039 suggesting he was utterly incapable of becoming 00:03:57.039 --> 00:04:00.020 a scholar, that his father, Nils, made a really 00:04:00.020 --> 00:04:02.159 drastic decision. He was ready to pull him out 00:04:02.159 --> 00:04:04.780 of school entirely. The plan was to apprentice 00:04:04.780 --> 00:04:07.360 the boy to an honest cobbler. At least that was 00:04:07.360 --> 00:04:09.500 a respectable, guaranteed trade. Think about 00:04:09.500 --> 00:04:11.620 that for a moment. The man who would literally 00:04:11.620 --> 00:04:14.669 name every species on the planet. nearly ended 00:04:14.669 --> 00:04:17.610 up fixing shoes. It's wild. It's just wild how 00:04:17.610 --> 00:04:20.209 close the scientific world came to losing his 00:04:20.209 --> 00:04:22.990 contribution. So what saved him? It wasn't the 00:04:22.990 --> 00:04:26.550 academic system. It was a mentor, a man named 00:04:26.550 --> 00:04:28.850 Johann Rothman. Right. Rothman was the state 00:04:28.850 --> 00:04:31.329 doctor of Smolin and also taught at the Vexio 00:04:31.329 --> 00:04:34.870 Gymnasium. Crucially, he was a botanist himself. 00:04:35.250 --> 00:04:38.649 So he saw past the bad grades. He saw the potential. 00:04:38.750 --> 00:04:41.769 He recognized Carl's genuine intellectual capacity 00:04:41.769 --> 00:04:44.269 and his encyclopedic knowledge of plants, so 00:04:44.269 --> 00:04:46.589 he intervened. He started teaching him anatomy, 00:04:46.730 --> 00:04:50.339 physiology, and most importantly, botany. And 00:04:50.339 --> 00:04:53.120 Rothman understood that to pursue botany in that 00:04:53.120 --> 00:04:55.439 era, you had to go into medicine. It was the 00:04:55.439 --> 00:04:57.620 only way. It was the only formalized pathway 00:04:57.620 --> 00:04:59.899 to study plants and natural history professionally. 00:05:00.240 --> 00:05:03.480 So this intervention, it just fundamentally redirected 00:05:03.480 --> 00:05:05.180 the course of his life. It pulled him from the 00:05:05.180 --> 00:05:06.980 cobbler's bench and set him on the scientific 00:05:06.980 --> 00:05:09.339 path. So following Rothman's advice, Linnaeus 00:05:09.339 --> 00:05:11.959 begins his studies at Lund University in 1727. 00:05:12.459 --> 00:05:14.879 He registers under the Latinized version of his 00:05:14.879 --> 00:05:17.850 name, Carolus Linnaeus. And while he was there, 00:05:17.930 --> 00:05:19.870 he benefited from the tutelage of a physician 00:05:19.870 --> 00:05:22.829 named Kilian Stobaeus, who saw his thirst for 00:05:22.829 --> 00:05:25.029 knowledge and just gave him unrestricted access 00:05:25.029 --> 00:05:27.209 to his private library and his natural history 00:05:27.209 --> 00:05:29.850 collections. But the real professional move was 00:05:29.850 --> 00:05:34.050 to Uppsala in 1728. Rothman had recommended it 00:05:34.050 --> 00:05:36.269 as the most prestigious center in Sweden for 00:05:36.269 --> 00:05:40.060 medicine and botany. But the reality was... A 00:05:40.060 --> 00:05:43.360 bit of a letdown. The key professors, Olaf Redbeck 00:05:43.360 --> 00:05:46.399 the Younger and Lars Roberg, were aging. They 00:05:46.399 --> 00:05:48.920 had largely stopped active teaching. So the best 00:05:48.920 --> 00:05:50.879 place in Sweden wasn't actually that great for 00:05:50.879 --> 00:05:53.269 learning. Not at that moment. Rudbeck in particular 00:05:53.269 --> 00:05:56.029 was famous, but he was physically frail and just 00:05:56.029 --> 00:05:59.050 not scientifically engaged anymore. But the sources 00:05:59.050 --> 00:06:01.889 suggest this environment may have ironically 00:06:01.889 --> 00:06:04.490 spurred Linnaeus' creativity. He had to teach 00:06:04.490 --> 00:06:07.069 himself. And his self -directed study led to 00:06:07.069 --> 00:06:09.449 an immediate academic triumph that just fundamentally 00:06:09.449 --> 00:06:12.689 changed his status. It did. In 1729, he wrote 00:06:12.689 --> 00:06:16.250 a thesis, Preludia Sponsaliorum Plantarum, The 00:06:16.250 --> 00:06:18.569 Prelude to the Nuptials of Plants. And this was 00:06:18.569 --> 00:06:20.709 groundbreaking, right? Because it focused entirely 00:06:20.750 --> 00:06:23.029 entirely on plant sexual reproduction. Exactly. 00:06:23.209 --> 00:06:25.230 It established the idea that plants, just like 00:06:25.230 --> 00:06:27.569 animals, had clear sexual organs, the stamens 00:06:27.569 --> 00:06:29.850 and pistils. And this was a major philosophical 00:06:29.850 --> 00:06:31.889 break from prior botanical thought, which often 00:06:31.889 --> 00:06:34.550 avoided discussing plant sexuality so explicitly. 00:06:34.829 --> 00:06:37.769 It also caused a bit of a stir. I can imagine 00:06:37.769 --> 00:06:41.610 describing plants engaging in marriage was considered 00:06:42.060 --> 00:06:44.939 quite scandalous. Oh, highly controversial. It 00:06:44.939 --> 00:06:47.439 was seen as almost immoral by some religious 00:06:47.439 --> 00:06:50.540 authorities. Yeah. You're introducing human sexuality 00:06:50.540 --> 00:06:53.480 into the natural world in a way that many found 00:06:53.480 --> 00:06:56.199 really inappropriate for public discussion. But 00:06:56.199 --> 00:06:58.420 despite the scandal, or maybe because of it, 00:06:58.480 --> 00:07:01.920 it deeply impressed the aging Rudbeck. So impressed, 00:07:02.019 --> 00:07:04.480 in fact, that Rudbeck allowed the second year 00:07:04.480 --> 00:07:07.300 student Linnaeus to step in and start delivering 00:07:07.300 --> 00:07:10.120 public lectures on botany to the university. 00:07:10.639 --> 00:07:12.860 That's extraordinary. It is. He was lecturing 00:07:12.860 --> 00:07:15.120 to audiences that sometimes swelled to 300 people, 00:07:15.300 --> 00:07:17.480 just filling a vacuum left by the inactive professors. 00:07:17.860 --> 00:07:20.160 And it was during this intensive period of teaching 00:07:20.160 --> 00:07:22.860 and studying that Linnaeus really developed a 00:07:22.860 --> 00:07:25.139 deep dissatisfaction with the existing classification 00:07:25.139 --> 00:07:29.120 systems. He saw the complexity and the arbitrariness 00:07:29.120 --> 00:07:30.939 of the older systems. Right, like Ternafort's 00:07:30.939 --> 00:07:32.699 system. Yeah. And he decided he needed something 00:07:32.699 --> 00:07:35.279 simpler, more universally applicable, and purely 00:07:35.279 --> 00:07:37.759 objective. So this is where the seed of the Linnaean 00:07:37.759 --> 00:07:40.639 system really takes root. Exactly. He decided 00:07:40.639 --> 00:07:42.339 that the classification of plants shouldn't be 00:07:42.339 --> 00:07:45.339 based on arbitrary things like leaf shape or 00:07:45.339 --> 00:07:48.079 fruit type, but on the simple observable number 00:07:48.079 --> 00:07:50.680 and arrangement of the sexual organs, the stamens 00:07:50.680 --> 00:07:54.120 and pistils. This sexual system became the organizational 00:07:54.120 --> 00:07:57.019 backbone for his future monumental work, General 00:07:57.019 --> 00:08:00.379 Plantarum. So once he had this theoretical framework, 00:08:00.879 --> 00:08:03.699 he needed to prove it worked in the field. And 00:08:03.699 --> 00:08:06.759 that leads to the iconic 1732 Lapland expedition, 00:08:07.060 --> 00:08:09.459 a journey that still defines his adventurous 00:08:09.459 --> 00:08:12.040 spirit. And this was not a luxury trip. He was 00:08:12.040 --> 00:08:14.459 sort of following the ghost of Olaf Redbeck the 00:08:14.459 --> 00:08:17.319 Younger, whose own Lapland field work from 1695 00:08:17.319 --> 00:08:20.000 had been tragically lost in a fire. He secured 00:08:20.000 --> 00:08:22.339 a modest grant and set off alone. all alone. 00:08:22.500 --> 00:08:24.480 He was often traveling in the traditional leather 00:08:24.480 --> 00:08:26.379 boots and clothes of the Sami people. It was 00:08:26.379 --> 00:08:30.060 a six -month grueling endeavor. Over 2 ,000 kilometers 00:08:30.060 --> 00:08:33.519 by foot and horse across this unforgiving terrain 00:08:33.519 --> 00:08:35.899 of northern Sweden. And his mission was huge. 00:08:36.100 --> 00:08:39.179 Record new flora, fauna, minerals, and meticulously 00:08:39.179 --> 00:08:41.519 document the customs and daily life of the native 00:08:41.519 --> 00:08:43.639 Sami population. He was viewing them through 00:08:43.639 --> 00:08:46.480 the lens of a meticulous ethnographic observer. 00:08:47.120 --> 00:08:49.379 The documents from this trip give us such a deep 00:08:49.379 --> 00:08:52.360 insight into his mind. Absolutely. He traveled 00:08:52.360 --> 00:08:54.960 with his journal, meticulously drawing and making 00:08:54.960 --> 00:08:57.500 notes, carrying large quantities of paper for 00:08:57.500 --> 00:09:00.200 pressing and preserving plant specimens. He often 00:09:00.200 --> 00:09:02.720 slept under the open sky. He was testing his 00:09:02.720 --> 00:09:05.340 system against the raw wilderness. And the journey 00:09:05.340 --> 00:09:07.740 yielded a discovery that became intensely personal 00:09:07.740 --> 00:09:10.980 for him. Near Gevel, he stumbled upon the delicate 00:09:10.980 --> 00:09:14.090 twin flower. Campanula serpillifolia. It was 00:09:14.090 --> 00:09:16.950 a discovery he really cherished. Years later, 00:09:17.090 --> 00:09:19.529 his friend Johann Frederick Grenovius named the 00:09:19.529 --> 00:09:23.370 genus Linnea, in his honor, specifically Linnea 00:09:23.370 --> 00:09:27.409 borealis. The twin flower. Two small pink bells 00:09:27.409 --> 00:09:30.549 dangling from a thread -like stalk. It was a 00:09:30.549 --> 00:09:33.549 perfect, modest symbol for the man who saw elegance 00:09:33.549 --> 00:09:35.809 and simplicity. It became his personal emblem, 00:09:36.009 --> 00:09:38.029 appearing on portraits and even on his coat of 00:09:38.029 --> 00:09:39.750 arms later in life. And all the observations 00:09:39.750 --> 00:09:42.029 he gathered, they formed the basis of his Flora 00:09:42.029 --> 00:09:44.570 Leponica. They did. The Flora Leponica was published 00:09:44.570 --> 00:09:48.289 later, describing 534 species, and it was a landmark 00:09:48.289 --> 00:09:50.690 document. It wasn't just a list. It was the first 00:09:50.690 --> 00:09:52.509 time he had truly implemented his classification 00:09:52.509 --> 00:09:55.450 ideas on a large scale. So it's correctly viewed 00:09:55.450 --> 00:09:58.570 as the first proto -modern flora. Yes, because 00:09:58.570 --> 00:10:01.379 it... demonstrated how his organized system could 00:10:01.379 --> 00:10:05.059 bring clarity to regional biology. But the truly 00:10:05.059 --> 00:10:07.960 transformative moment, the insight that elevated 00:10:07.960 --> 00:10:10.740 him beyond just being a botanist, it didn't come 00:10:10.740 --> 00:10:12.960 from a flower. No, it came from something far 00:10:12.960 --> 00:10:15.860 more mundane, yet so profoundly revealing. This 00:10:15.860 --> 00:10:18.159 is where it gets really interesting. While traveling, 00:10:18.340 --> 00:10:21.419 he finds the lower jawbone of a horse lying on 00:10:21.419 --> 00:10:23.480 the road. And instead of just dismissing it, 00:10:23.559 --> 00:10:26.679 he stops. He stops and analyzes it with his systematic 00:10:26.679 --> 00:10:29.870 mind. He realizes that if he could observe and 00:10:29.870 --> 00:10:32.590 catalog key structural features, specifically 00:10:32.590 --> 00:10:35.629 the number and kind of teeth, and later the placement 00:10:35.629 --> 00:10:38.629 of teats, he could extrapolate a perfectly natural 00:10:38.629 --> 00:10:41.269 system for the arrangement of all quadrupeds. 00:10:41.429 --> 00:10:43.309 So the revelation wasn't just for plants, it 00:10:43.309 --> 00:10:46.230 was universal. Exactly. He realized his organizational 00:10:46.230 --> 00:10:48.710 principles could apply to the entire animal kingdom. 00:10:48.889 --> 00:10:51.769 This set him up for that dramatic leap into zoology 00:10:51.769 --> 00:10:54.570 that we find in Systema Naturae. This single 00:10:54.570 --> 00:10:57.009 moment on the road confirmed his belief that 00:10:57.009 --> 00:10:59.950 anatomical details, no matter how small, held 00:10:59.950 --> 00:11:02.450 the key to organizing the whole world. Okay, 00:11:02.490 --> 00:11:06.070 so by 1735, Linnaeus desperately needs a medical 00:11:06.070 --> 00:11:08.870 degree. Not just for professional legitimacy, 00:11:09.029 --> 00:11:11.850 but also to get patronage. Because Sweden was 00:11:11.850 --> 00:11:14.389 still pretty scientifically isolated. So he travels 00:11:14.389 --> 00:11:16.289 to the Dutch Republic, which was the European 00:11:16.289 --> 00:11:19.450 hub for natural history, libraries, advanced 00:11:19.450 --> 00:11:22.330 publishing, everything he needed. But the journey 00:11:22.330 --> 00:11:25.690 itself... started with an incredible and almost 00:11:25.690 --> 00:11:28.850 disastrous anecdote in Hamburg. The famous Hamburg 00:11:28.850 --> 00:11:31.610 Hydra incident. Linnaeus stops in Hamburg and 00:11:31.610 --> 00:11:34.169 he's shown what was being marketed as a seven 00:11:34.169 --> 00:11:36.809 -headed Hydra allegedly captured in Africa. And 00:11:36.809 --> 00:11:38.990 the mayor who owned it was planning to sell it 00:11:38.990 --> 00:11:40.909 for a massive sum of money. Right, potentially 00:11:40.909 --> 00:11:43.830 to an emperor. But Linnaeus, guided by this fierce 00:11:43.830 --> 00:11:46.679 dedication to observable truth, He takes one 00:11:46.679 --> 00:11:48.740 look at the specimen and immediately exposes 00:11:48.740 --> 00:11:51.500 it as a crude fake. How did he know? He pointed 00:11:51.500 --> 00:11:53.179 out that the heads were actually cobbled together 00:11:53.179 --> 00:11:55.820 from weasel jaws and paws and then stitched onto 00:11:55.820 --> 00:11:58.840 snake skins. He even suggested the fraud might 00:11:58.840 --> 00:12:01.120 have been created by monks to depict the Beast 00:12:01.120 --> 00:12:03.659 of Revelation. So his scientific integrity completely 00:12:03.659 --> 00:12:06.879 torpedoed the mayor's scheme. It did. By making 00:12:06.879 --> 00:12:09.559 his findings public, he endangered himself and 00:12:09.559 --> 00:12:12.080 his traveling companion. They had to flee Hamburg 00:12:12.080 --> 00:12:15.700 very quickly to avoid reprisal. It just showcases 00:12:15.700 --> 00:12:17.919 his relentless commitment to objective observation. 00:12:18.460 --> 00:12:21.679 He prioritized truth over personal safety or 00:12:21.679 --> 00:12:24.379 wealth. Once he reached the Netherlands, he moved 00:12:24.379 --> 00:12:26.899 with lightning speed. He gets his medical doctorate 00:12:26.899 --> 00:12:28.940 at the University of Harderwick in just two weeks. 00:12:29.200 --> 00:12:31.919 That speed was possible because Harderwick, unlike 00:12:31.919 --> 00:12:34.919 Leiden or Utrecht, allowed candidates to submit 00:12:34.919 --> 00:12:37.940 a pre -written thesis. His thesis was on intermittent 00:12:37.940 --> 00:12:41.419 fevers, what we now know as malaria. And he correctly 00:12:41.419 --> 00:12:44.639 linked the disease to areas with clay -rich soils 00:12:44.639 --> 00:12:47.059 and stagnant water, which was an important habitat 00:12:47.059 --> 00:12:49.879 observation. He just missed the vector, the mosquito. 00:12:50.139 --> 00:12:52.299 He missed the mosquito, but he did include this 00:12:52.299 --> 00:12:54.600 incredibly prescient observation about treatment. 00:12:54.759 --> 00:12:57.940 He proposed using Artemisia annua, or wormwood, 00:12:58.039 --> 00:13:00.879 as a possible treatment. Centuries later, Artemisinin. 00:13:01.279 --> 00:13:03.460 derived from that very plant became a central 00:13:03.460 --> 00:13:05.960 pillar of modern anti -malarial medicine. An 00:13:05.960 --> 00:13:08.279 astonishing piece of insight based on plant knowledge 00:13:08.279 --> 00:13:11.279 alone. And that same summer, he reconnected with 00:13:11.279 --> 00:13:14.259 his Uppsala friend, Peter Artetti, with whom 00:13:14.259 --> 00:13:16.860 he'd made a solemn pact years earlier. A pact 00:13:16.860 --> 00:13:18.960 that stated if one of them died, the survivor 00:13:18.960 --> 00:13:21.159 would ensure the other's manuscript was completed 00:13:21.159 --> 00:13:23.659 and published. And tragically, Artetti drowned 00:13:23.659 --> 00:13:26.899 in an Amsterdam canal just 10 weeks after their 00:13:26.899 --> 00:13:29.580 reunion. So Linnaeus, upholding his commitment, 00:13:29.759 --> 00:13:32.259 immediately set aside his own projects to finish 00:13:32.259 --> 00:13:34.539 Arteti's manuscript on the classification of 00:13:34.539 --> 00:13:37.059 fish, the Ichthyologia. So these three years, 00:13:37.139 --> 00:13:40.620 1735 to 1738, they were just this unprecedented 00:13:40.620 --> 00:13:43.799 creative burst. They defined his career because 00:13:43.799 --> 00:13:45.820 they culminated in the revolutionary publication 00:13:45.820 --> 00:13:48.539 that introduced his core system to the world, 00:13:49.220 --> 00:13:51.820 Systema Naturae. Linnaeus arrived in the Netherlands 00:13:51.820 --> 00:13:55.019 as this, you know, obscure Swedish student, and 00:13:55.019 --> 00:13:57.309 he left as a recognized European scientist. scientific 00:13:57.309 --> 00:13:59.929 celebrity. And that transformation was entirely 00:13:59.929 --> 00:14:02.350 driven by the profound clarity and practicality 00:14:02.350 --> 00:14:04.250 of his organizational structure. The publication 00:14:04.250 --> 00:14:07.009 of Systema Naturae was the pivot point. How did 00:14:07.009 --> 00:14:09.929 an academic manuscript from a young Swede suddenly 00:14:09.929 --> 00:14:12.590 become a European sensation? It was the immediate 00:14:12.590 --> 00:14:16.090 realization of its utility. In Leiden, Linnaeus 00:14:16.090 --> 00:14:19.029 met Johan Frederick Grenovius, a Dutch botanist, 00:14:19.110 --> 00:14:21.750 and showed him his manuscript. Grenovius was 00:14:21.750 --> 00:14:24.750 instantly captivated by its simplicity and offered 00:14:24.750 --> 00:14:27.330 to finance the printing himself. Along with a 00:14:27.330 --> 00:14:29.830 Scottish doctor, Isaac Lawson. That's right. 00:14:30.049 --> 00:14:33.070 And the first edition of Systema Naturae in 1735 00:14:33.070 --> 00:14:35.950 is legendary. We think of these revolutionary 00:14:35.950 --> 00:14:38.929 scientific texts as massive tomes, but this was 00:14:38.929 --> 00:14:42.110 a concise revolutionary document. It was just 00:14:42.110 --> 00:14:44.929 12 pages long, structured like a large chart. 00:14:45.279 --> 00:14:47.720 But those 12 pages contained the blueprint for 00:14:47.720 --> 00:14:50.820 classifying the entire natural world, a bold 00:14:50.820 --> 00:14:53.860 three kingdom system and crucially the introduction 00:14:53.860 --> 00:14:57.179 of binomial nomenclature. And that binomial innovation 00:14:57.179 --> 00:14:59.960 is what we still use every day. But it's hard 00:14:59.960 --> 00:15:02.159 to grasp how radical it was without understanding 00:15:02.159 --> 00:15:04.919 the system it replaced. The old system was hopelessly 00:15:04.919 --> 00:15:07.220 inefficient. It used polynomial names, these 00:15:07.220 --> 00:15:10.220 long, cumbersome Latin descriptive phrases that 00:15:10.220 --> 00:15:12.220 functioned more like brief descriptions than 00:15:12.220 --> 00:15:14.340 a simple name. Like the example for the physalis. 00:15:14.570 --> 00:15:18.590 Exactly. Before Linnaeus, a common species was 00:15:18.590 --> 00:15:28.970 named. That's a paragraph. How could you possibly 00:15:28.970 --> 00:15:31.750 communicate globally if every time you mentioned 00:15:31.750 --> 00:15:34.549 a species, you had to recite its defining traits? 00:15:34.929 --> 00:15:37.899 You couldn't. It led to mass confusion. different 00:15:37.899 --> 00:15:39.799 naturalists using different descriptions for 00:15:39.799 --> 00:15:42.919 the same species. Linnaeus replaced this arbitrary, 00:15:43.240 --> 00:15:46.419 unwieldy system with a simple two -part system, 00:15:46.600 --> 00:15:49.779 the generic name, followed by the specific epithet. 00:15:49.799 --> 00:15:52.440 So that paragraph -long descriptor became simply 00:15:52.440 --> 00:15:55.450 Physalis angulata. The name became a label, not 00:15:55.450 --> 00:15:58.049 a description. Exactly. It provided a universal, 00:15:58.389 --> 00:16:01.210 unambiguous address label for every living thing. 00:16:01.450 --> 00:16:03.309 And while he didn't invent two -word naming, 00:16:03.529 --> 00:16:05.429 the Bowen brothers had used it 200 years prior. 00:16:05.889 --> 00:16:08.009 Linnaeus was the first to formalize and apply 00:16:08.009 --> 00:16:10.309 it consistently across all biological kingdoms. 00:16:10.610 --> 00:16:12.889 He took a sporadic practice and made it the indispensable 00:16:12.889 --> 00:16:15.169 rule. And that cemented it into the scientific 00:16:15.169 --> 00:16:17.809 standard. You can just imagine how field naturalists 00:16:17.809 --> 00:16:19.889 and collectors embraced it. It streamlined their 00:16:19.889 --> 00:16:21.970 work immediately. Suddenly, global scientific 00:16:21.970 --> 00:16:25.240 correspondence becomes clear. Instantly. A collector 00:16:25.240 --> 00:16:27.659 in South America sends a specimen to London with 00:16:27.659 --> 00:16:30.700 the new binomial system, and there's zero ambiguity. 00:16:31.059 --> 00:16:33.779 It transcended language barriers and national 00:16:33.779 --> 00:16:37.200 borders. So Linnaeus' fame, once launched by 00:16:37.200 --> 00:16:40.820 Sistema Natri, it needed financial fuel. And 00:16:40.820 --> 00:16:43.279 this came in the form of a crucial patron, George 00:16:43.279 --> 00:16:46.210 Clifford III. Clifford was a titan of commerce, 00:16:46.450 --> 00:16:49.629 a director of the Dutch East India Company, and 00:16:49.629 --> 00:16:51.870 critically for Linnaeus, the owner of one of 00:16:51.870 --> 00:16:54.169 Europe's most spectacular botanical gardens at 00:16:54.169 --> 00:16:56.889 his estate, Hardicamp. And he invites Linnaeus 00:16:56.889 --> 00:16:58.730 to be his personal physician and superintendent 00:16:58.730 --> 00:17:03.490 of his garden. From 1735 to 1738, a period Linnaeus 00:17:03.490 --> 00:17:05.950 often cited as the high point of his life. What 00:17:05.950 --> 00:17:07.970 made Hardicamp so special? It was a collector's 00:17:07.970 --> 00:17:11.079 dream. Clifford maintained four enormous glasshouses 00:17:11.079 --> 00:17:13.599 filled with exotic plants from the trade routes 00:17:13.599 --> 00:17:16.259 of the East Indy Company. Linnaeus was given 00:17:16.259 --> 00:17:18.619 full reign over these thousands of plants, allowing 00:17:18.619 --> 00:17:21.259 him to test his system on this overwhelming diversity 00:17:21.259 --> 00:17:23.660 of foreign life. He called it the happiest time 00:17:23.660 --> 00:17:25.640 of my life. And it was certainly productive. 00:17:25.880 --> 00:17:28.579 He completed Hortus Clifforcianus, a detailed 00:17:28.579 --> 00:17:31.059 catalog of Clifford's holdings, in just nine 00:17:31.059 --> 00:17:34.019 months. That speed just confirms his organizational 00:17:34.019 --> 00:17:37.730 efficiency. In that work, he cataloged and named 00:17:37.730 --> 00:17:40.569 hundreds of species. For instance, it was here 00:17:40.569 --> 00:17:43.650 he first coined the genus name Nepenthes for 00:17:43.650 --> 00:17:45.789 the pitcher plant. Referencing the Nepenthe, 00:17:45.849 --> 00:17:48.410 the drug of forgetfulness from Greek mythology. 00:17:48.730 --> 00:17:51.539 Exactly. perhaps suggesting the plant helped 00:17:51.539 --> 00:17:54.339 him forget the cares of the world, and his patronage 00:17:54.339 --> 00:17:57.839 also extended his reach. Clifford funded a trip 00:17:57.839 --> 00:18:00.799 for Linnaeus to England. A key center for natural 00:18:00.799 --> 00:18:03.980 history. He met Sir Hans Sloane, whose collections 00:18:03.980 --> 00:18:05.819 would eventually form the basis of the British 00:18:05.819 --> 00:18:08.220 Museum. And he also visited the Chelsea Physic 00:18:08.220 --> 00:18:10.640 Garden and met its influential keeper, Philip 00:18:10.640 --> 00:18:13.440 Miller. But Miller was initially resistant, wasn't 00:18:13.440 --> 00:18:15.839 he? This wasn't an automatic adoption. Not at 00:18:15.839 --> 00:18:18.559 all. Miller represented the older guard. He was 00:18:18.559 --> 00:18:21.500 skeptical of the sexual system and this new simplification. 00:18:21.500 --> 00:18:24.000 It took years of correspondence and, frankly, 00:18:24.119 --> 00:18:26.619 the undeniable evidence of the system's utility 00:18:26.619 --> 00:18:29.200 by other scientists for Miller to finally relent. 00:18:29.500 --> 00:18:31.920 He didn't fully convert his highly influential 00:18:31.920 --> 00:18:34.420 Gardner's Dictionary until the 1768 edition. 00:18:34.920 --> 00:18:37.140 Which just shows that even a brilliant, simpler 00:18:37.140 --> 00:18:39.960 system faced decades of institutional resistance 00:18:39.960 --> 00:18:43.079 before achieving total dominance. So once he 00:18:43.079 --> 00:18:45.740 had the language binomial nomenclature, he needed 00:18:45.740 --> 00:18:48.380 the structure. How did he organize the staggering 00:18:48.380 --> 00:18:50.799 volume of nature into a functional, universally 00:18:50.799 --> 00:18:53.519 recognized system? He established what we now 00:18:53.519 --> 00:18:57.000 know as Linnaean taxonomy, the nested hierarchy. 00:18:57.420 --> 00:19:00.480 This was his second crucial contribution. the 00:19:00.480 --> 00:19:02.799 blueprint for categorization that still informs 00:19:02.799 --> 00:19:06.019 modern biology. And he started with three fundamental 00:19:06.019 --> 00:19:08.980 categories, or kingdoms. Animal, plant, and mineral. 00:19:09.180 --> 00:19:11.599 For Linnaeus, the definition was based on function. 00:19:11.680 --> 00:19:14.859 The animals, animalia, live, sense, and spontaneously 00:19:14.859 --> 00:19:17.980 move. The plants, vegetabilia, live and grow. 00:19:18.099 --> 00:19:20.660 And the minerals, the pides, only grow, in the 00:19:20.660 --> 00:19:22.799 sense that crystals form. And within these kingdoms, 00:19:22.859 --> 00:19:25.420 he created the ring structure. kingdoms divided 00:19:25.420 --> 00:19:28.900 into classes, then orders, genera, and finally 00:19:28.900 --> 00:19:31.259 species. This hierarchical method where every 00:19:31.259 --> 00:19:33.339 species belongs to a group, which in turn belongs 00:19:33.339 --> 00:19:36.259 to a larger group, it feels intuitive now, but 00:19:36.259 --> 00:19:39.039 it was revolutionary then. It provided a comprehensive 00:19:39.039 --> 00:19:42.240 filing system based entirely on observable, shared 00:19:42.240 --> 00:19:44.740 physical characteristics. And we still use that 00:19:44.740 --> 00:19:46.980 basic framework today. We do. We've inserted 00:19:46.980 --> 00:19:49.900 ranks like family and phylum, and we use genetics 00:19:49.900 --> 00:19:52.460 to define relationships. But the basic idea of 00:19:52.460 --> 00:19:54.559 moving from broad categories down to specific 00:19:54.559 --> 00:19:57.720 names remains the indispensable basis of modern 00:19:57.720 --> 00:20:00.359 taxonomy. He detailed this system across several 00:20:00.359 --> 00:20:03.599 foundational publications. After Systema Naturae, 00:20:03.680 --> 00:20:07.859 the next key text was Genera Plantarum. in 1737 00:20:07.859 --> 00:20:10.279 this was where the sexual system really came 00:20:10.279 --> 00:20:13.140 to life in genera plantarum he defined and described 00:20:13.140 --> 00:20:16.940 935 plant genera grouping them into those 24 00:20:16.940 --> 00:20:19.640 classes based purely on the number size and location 00:20:19.640 --> 00:20:23.140 of the stamens and pistols in class 24 cryptogamia 00:20:23.529 --> 00:20:25.390 That sounds like a rather large catch -all category. 00:20:25.650 --> 00:20:28.109 It was. Affectionately called the wastebasket 00:20:28.109 --> 00:20:31.609 taxon by some, cryptogania literally means concealed 00:20:31.609 --> 00:20:34.049 marriage, and it included all plants where the 00:20:34.049 --> 00:20:36.009 reproductive parts were hidden mosses, liver 00:20:36.009 --> 00:20:39.130 warts, fungi, ferns, algae. So he just grouped 00:20:39.130 --> 00:20:41.970 them by the lack of visible sexual parts. Right. 00:20:42.049 --> 00:20:44.569 He admitted that classifying them based on sexuality 00:20:44.569 --> 00:20:46.569 was difficult because their reproductive organs 00:20:46.569 --> 00:20:49.230 were unknown or too small to observe. Then, in 00:20:49.230 --> 00:20:53.740 1751, he provided the methodology handbook. Philosophia 00:20:53.740 --> 00:20:56.200 Botanica. This was the instruction manual for 00:20:56.200 --> 00:20:58.440 the new age of botany. It wasn't just theoretical. 00:20:58.640 --> 00:21:01.359 It was intensely practical. It contained the 00:21:01.359 --> 00:21:03.740 complete elaboration of his taxonomic rules, 00:21:03.920 --> 00:21:07.099 but also offered pragmatic advice. Like how to 00:21:07.099 --> 00:21:09.220 keep a journal and preserve specimens. Exactly. 00:21:09.359 --> 00:21:11.980 Skills that were absolutely vital for his students 00:21:11.980 --> 00:21:14.420 who would soon be traveling the globe. But the 00:21:14.420 --> 00:21:17.460 apex, the single most enduring document that 00:21:17.460 --> 00:21:21.019 anchors modern biology, is Species Plantarum. 00:21:21.259 --> 00:21:24.319 Absolutely. Published in two volumes in 1753, 00:21:24.619 --> 00:21:27.299 Species Plantarum described and named over 7 00:21:27.299 --> 00:21:30.940 ,300 species. Its importance cannot be overstated. 00:21:31.099 --> 00:21:33.400 It became the internationally accepted starting 00:21:33.400 --> 00:21:36.059 point for modern botanical nomenclature. If you 00:21:36.059 --> 00:21:37.680 want to know the valid name of a plant species, 00:21:38.000 --> 00:21:39.819 you trace it back to the name Linnaeus established 00:21:39.819 --> 00:21:42.200 in this book. He created a universal scientific 00:21:42.200 --> 00:21:45.039 language. But the truly remarkable thing is that 00:21:45.039 --> 00:21:47.200 he accomplished this global dominance while spending 00:21:47.200 --> 00:21:49.740 the last four decades of his life entirely within 00:21:49.740 --> 00:21:52.519 Sweden. His system was exported by his students. 00:21:52.900 --> 00:21:56.359 After returning to Sweden in 1738, he eventually 00:21:56.359 --> 00:21:59.099 secured his position at Uppsala University, becoming 00:21:59.099 --> 00:22:02.500 professor of medicine and later focusing on botany 00:22:02.500 --> 00:22:04.839 and the revitalization of the botanical garden. 00:22:05.099 --> 00:22:08.079 His teaching legacy became the engine of his 00:22:08.079 --> 00:22:10.380 global influence. His lectures were immensely 00:22:10.380 --> 00:22:13.380 popular. And he encouraged his students to challenge 00:22:13.380 --> 00:22:15.539 received wisdom, even his own. And it was this 00:22:15.539 --> 00:22:18.660 intense loyalty and shared enthusiasm that led 00:22:18.660 --> 00:22:21.859 him to nickname his most devoted pupils his apostles. 00:22:22.319 --> 00:22:25.079 There were 17 apostles in total, and they were 00:22:25.079 --> 00:22:27.619 essential. Linnaeus provided them with specific 00:22:27.619 --> 00:22:30.480 collection instructions, sent them off with grants, 00:22:30.599 --> 00:22:32.720 and directed them to destinations across the 00:22:32.720 --> 00:22:36.039 globe, South Africa, North America, Japan. They 00:22:36.039 --> 00:22:38.559 traveled, collected, and crucially organized 00:22:38.559 --> 00:22:41.079 their specimens strictly according to the new 00:22:41.079 --> 00:22:43.059 Linnaean system. So the apostles didn't just 00:22:43.059 --> 00:22:44.940 collect, they validated the system in the field. 00:22:45.039 --> 00:22:47.940 Exactly. By consistently using his binomial naming 00:22:47.940 --> 00:22:50.660 and hierarchical structure, they proved its immediate 00:22:50.660 --> 00:22:53.400 utility and helped cement Linnaean taxonomy as 00:22:53.400 --> 00:22:55.460 the global standard. But we have to acknowledge 00:22:55.460 --> 00:22:58.779 the immense human cost. These were often solitary, 00:22:59.039 --> 00:23:01.859 dangerous expeditions. The fatality rate among 00:23:01.859 --> 00:23:04.880 the apostles was devastating. Christopher Turnstrum, 00:23:04.960 --> 00:23:07.440 the first apostle, died of a tropical fever in 00:23:07.440 --> 00:23:11.880 1746 on his way to China. His wife publicly blamed 00:23:11.880 --> 00:23:14.420 Linnaeus. which reportedly led him to prefer 00:23:14.420 --> 00:23:17.180 sending younger, unmarried students in the future. 00:23:17.339 --> 00:23:19.519 That tragedy must have weighed heavily on him. 00:23:19.579 --> 00:23:22.019 The sheer difficulty of travel was murderous. 00:23:22.220 --> 00:23:25.240 Six other apostles died on their journeys, from 00:23:25.240 --> 00:23:27.880 disease, shipwreck, even assassination attempts. 00:23:28.240 --> 00:23:30.339 It's important to pause and appreciate that emotional 00:23:30.339 --> 00:23:33.420 sacrifice. Linnaeus stayed safe in Uppsala, managing 00:23:33.420 --> 00:23:36.240 his garden, while his devoted students risk everything 00:23:36.240 --> 00:23:38.720 to validate and populate his system. But the 00:23:38.720 --> 00:23:41.180 successes were transformative for science. Per 00:23:41.180 --> 00:23:43.279 Colm's expedition to North America was highly 00:23:43.279 --> 00:23:45.880 fruitful. He brought back material Linnaeus had 00:23:45.880 --> 00:23:48.660 never seen. I think at least 90 of the 700 North 00:23:48.660 --> 00:23:51.359 American species in the 10th edition of Systema 00:23:51.359 --> 00:23:53.539 Naturae came from him. He was incredibly important. 00:23:53.819 --> 00:23:55.819 And then you have the apostles who sailed with 00:23:55.819 --> 00:23:58.500 James Cook. Daniel Solander, who had lived in 00:23:58.500 --> 00:24:02.259 Linnaeus' own home, accompanied Cook. And Andrew 00:24:02.259 --> 00:24:04.619 Sparman followed on Cook's resolution expedition. 00:24:05.000 --> 00:24:07.420 The fact that the naturalists on the most important 00:24:07.420 --> 00:24:10.500 scientific voyages of the era were using the 00:24:10.500 --> 00:24:13.720 Linnaean system immediately established its preeminence. 00:24:13.859 --> 00:24:15.900 And finally, there's the incredible story of 00:24:15.900 --> 00:24:18.720 Carl Peter Thunberg, who managed to collect plants 00:24:18.720 --> 00:24:22.950 in isolationist Japan. He worked through the 00:24:22.950 --> 00:24:26.789 small Dutch trading post outside Nagasaki, persuading 00:24:26.789 --> 00:24:29.869 translators to bring him specimens. It just confirmed 00:24:29.869 --> 00:24:32.869 the true global operational reach of the system. 00:24:33.029 --> 00:24:35.250 So while the plant system was broadly accepted, 00:24:35.609 --> 00:24:38.369 Linnaeus created a firestorm of controversy when 00:24:38.369 --> 00:24:40.750 he turned his classifying eye toward the animal 00:24:40.750 --> 00:24:43.849 kingdom, particularly when he placed Homo sapiens 00:24:43.849 --> 00:24:46.509 within it. This was a direct assault on the theological 00:24:46.509 --> 00:24:49.170 and philosophical status quo of the 18th century, 00:24:49.349 --> 00:24:52.210 which placed man on a spiritually separate plane. 00:24:52.470 --> 00:24:56.109 Completely. In the very first 1735 edition of 00:24:56.109 --> 00:24:59.930 Systema Naturae, Linnaeus grouped humans, homo, 00:24:59.930 --> 00:25:03.230 taxonomically with apes, simia, under the order 00:25:03.230 --> 00:25:06.190 he named anthropomorphic, meaning manlike. And 00:25:06.190 --> 00:25:08.170 what was the scientific rationale for such a 00:25:08.170 --> 00:25:10.890 provocative grouping? His reasoning was purely 00:25:10.890 --> 00:25:13.819 anatomical and morphological. He had studied 00:25:13.819 --> 00:25:16.180 specimens of monkeys and apes and noted that, 00:25:16.279 --> 00:25:19.000 when viewed purely as physical beings, the anatomy 00:25:19.000 --> 00:25:21.980 was nearly identical. He concluded that, based 00:25:21.980 --> 00:25:24.140 on observable traits, there was no objective 00:25:24.140 --> 00:25:26.849 morphological difference, save for speech. But 00:25:26.849 --> 00:25:29.130 surely he understood the religious and philosophical 00:25:29.130 --> 00:25:32.049 weight of the human soul and reason. He did, 00:25:32.190 --> 00:25:34.690 privately. He acknowledged that the capacity 00:25:34.690 --> 00:25:37.869 for reason and the soul were the real non -morphological 00:25:37.869 --> 00:25:40.009 distinctions. But his mission was to classify 00:25:40.009 --> 00:25:42.549 nature based on natural principles, meaning strictly 00:25:42.549 --> 00:25:44.930 observable physical traits. And this stance led 00:25:44.930 --> 00:25:46.970 to that famous clash with the German scientist 00:25:46.970 --> 00:25:50.390 Johann Gord Millen. That letter in 1747 remains 00:25:50.390 --> 00:25:52.569 one of the most powerful challenges to human 00:25:52.569 --> 00:25:55.109 exceptionalism of the era. Emelin criticized 00:25:55.109 --> 00:25:57.609 the anthropomorphic grouping and Linnaeus responded 00:25:57.609 --> 00:26:01.349 by demanding scientific proof. He wrote, I seek 00:26:01.349 --> 00:26:04.069 from you and from the whole world a generic difference 00:26:04.069 --> 00:26:06.849 between man and Simeon that follows from the 00:26:06.849 --> 00:26:10.230 principles of natural history. I absolutely know 00:26:10.230 --> 00:26:12.809 of none if only someone might tell me a single 00:26:12.809 --> 00:26:15.289 one. He effectively threw the challenge back 00:26:15.289 --> 00:26:17.859 at the critics. He said, If you claim we are 00:26:17.859 --> 00:26:20.640 different, tell me a single observable physical 00:26:20.640 --> 00:26:23.160 characteristic that follows my system's rules. 00:26:23.500 --> 00:26:25.539 The resulting theological conflict must have 00:26:25.539 --> 00:26:28.119 been immense. It fundamentally challenged the 00:26:28.119 --> 00:26:31.140 great chain of being. It was perceived as a profound 00:26:31.140 --> 00:26:34.619 demotion of humanity. If man was simply an animal 00:26:34.619 --> 00:26:36.640 placed right next to monkeys, it challenged the 00:26:36.640 --> 00:26:39.099 core idea that humanity was created distinctly 00:26:39.099 --> 00:26:41.220 in the image of God. By the time he published 00:26:41.220 --> 00:26:43.599 the landmark 10th edition of Systema Naturae 00:26:43.599 --> 00:26:46.759 in 1758, he shifted the terminology slightly. 00:26:47.019 --> 00:26:49.319 He did. He replaced anthropomorpho with the order 00:26:49.319 --> 00:26:52.119 primates, first ones or chief ones, and formally 00:26:52.119 --> 00:26:55.019 gave humans the binomial name homo sapiens, wise 00:26:55.019 --> 00:26:58.380 man. Which was maybe less provocative, but the 00:26:58.380 --> 00:27:01.549 core grouping remained. It remained intact, cementing 00:27:01.549 --> 00:27:03.970 the biological reality that humans are fundamentally 00:27:03.970 --> 00:27:07.369 part of the animal kingdom. And he also introduced 00:27:07.369 --> 00:27:10.369 another key concept in that edition, the class 00:27:10.369 --> 00:27:13.500 Mammalia. Based on the presence of mammary glands. 00:27:13.799 --> 00:27:16.160 And the sources suggest this was influenced by 00:27:16.160 --> 00:27:17.980 a social campaign he was running at the time. 00:27:18.059 --> 00:27:21.059 Right. He was a vocal advocate for maternal breastfeeding. 00:27:21.240 --> 00:27:23.980 At the time, particularly among the Swedish upper 00:27:23.980 --> 00:27:27.019 classes, it was common to use wet nurses. Linnaeus 00:27:27.019 --> 00:27:29.660 vehemently opposed this, arguing it was unnatural. 00:27:30.119 --> 00:27:32.380 He even wrote a pamphlet, Nutrix Noverka, the 00:27:32.380 --> 00:27:34.579 stepmother nurse. He did. And the creation of 00:27:34.579 --> 00:27:36.859 the class Mammalia, emphasizing breastfeeding, 00:27:37.039 --> 00:27:39.500 is thought to be a subtle scientific endorsement 00:27:39.500 --> 00:27:41.890 of his public health and social status. And it 00:27:41.890 --> 00:27:44.690 also appears the genus Homo was initially much 00:27:44.690 --> 00:27:47.670 broader than just Homo sapiens. It was. He attempted 00:27:47.670 --> 00:27:49.650 to classify other creatures he had heard about. 00:27:49.789 --> 00:27:52.950 He added Homo troglodytes, or cavemen, based 00:27:52.950 --> 00:27:55.549 on often exaggerated or mythological accounts. 00:27:55.849 --> 00:27:58.670 And Hermolar, which we now know as the Lar Gibbon, 00:27:58.710 --> 00:28:01.069 he was trying to bring order to every reported 00:28:01.069 --> 00:28:03.490 description, even if the information was dubious. 00:28:03.900 --> 00:28:07.099 Okay, so while his commitment to anatomical objectivity 00:28:07.099 --> 00:28:09.759 led to the controversial but scientifically sound 00:28:09.759 --> 00:28:13.059 grouping of primates, his attempt to subdivide 00:28:13.059 --> 00:28:16.039 Homo sapiens into varieties? This is where a 00:28:16.039 --> 00:28:19.200 deeply problematic legacy begins. Yes, and this 00:28:19.200 --> 00:28:21.599 requires critical discussion within its historical 00:28:21.599 --> 00:28:24.200 context. In the early editions, he initially 00:28:24.200 --> 00:28:26.640 divided Homo sapiens into four varieties based 00:28:26.640 --> 00:28:29.589 purely on continent and skin color. european 00:28:29.589 --> 00:28:32.829 american asian and african but by the later editions 00:28:32.829 --> 00:28:36.599 this changed it did By the 10th edition in 1758, 00:28:36.859 --> 00:28:39.900 his descriptions expanded dramatically. He began 00:28:39.900 --> 00:28:42.759 detailing specific, subjective, phenotypical 00:28:42.759 --> 00:28:45.299 characteristics for each variety, linking them 00:28:45.299 --> 00:28:47.819 explicitly to the ancient, non -scientific concept 00:28:47.819 --> 00:28:49.700 of the four temperaments. Did you give us an 00:28:49.700 --> 00:28:52.440 example of that? Certainly. For Europeus, white 00:28:52.440 --> 00:28:55.500 Europeans, he described them as sanguine, inventive, 00:28:55.500 --> 00:28:58.259 and governed by laws. For Americanus, red Americans, 00:28:58.599 --> 00:29:01.319 choleric and ruled by custom. For Asiaticus, 00:29:01.339 --> 00:29:03.539 yellow Asians, melancholic and governed by opinions. 00:29:03.950 --> 00:29:06.609 And for Africanus, black Africans, phlegmatic, 00:29:06.769 --> 00:29:09.170 cunning, and governed by caprice. And he also 00:29:09.170 --> 00:29:11.349 added the infamous homo monstrosis category. 00:29:11.769 --> 00:29:14.109 A catch -all taxon for various groups considered 00:29:14.109 --> 00:29:18.009 wild or abnormal. Now Linnaeus himself believed 00:29:18.009 --> 00:29:20.609 these variations resulted primarily from environmental 00:29:20.609 --> 00:29:24.099 differences, climate, diet, location. But regardless 00:29:24.099 --> 00:29:26.720 of his personal intent. The sources clearly show 00:29:26.720 --> 00:29:29.279 that the inclusion of subjective cultural, behavioral, 00:29:29.519 --> 00:29:32.160 and moral traits alongside physical characteristics 00:29:32.160 --> 00:29:35.859 was devastatingly influential. His attempt at 00:29:35.859 --> 00:29:38.500 classification, which prioritized skin color 00:29:38.500 --> 00:29:40.839 and temperament, formalized a racial hierarchy 00:29:40.839 --> 00:29:43.660 within a supposedly objective scientific framework. 00:29:44.019 --> 00:29:46.240 So in essence, he lent the prestige of his scientific 00:29:46.240 --> 00:29:50.079 system to colonial stereotypes, providing a structural 00:29:50.079 --> 00:29:52.559 foundation that later pseudoscientists would 00:29:52.559 --> 00:29:55.400 exploit to justify and fuel scientific racism 00:29:55.400 --> 00:29:58.579 for generations. Exactly. His enduring contribution 00:29:58.579 --> 00:30:00.740 is the structural framework of classification. 00:30:01.079 --> 00:30:03.480 But his application of that framework to human 00:30:03.480 --> 00:30:05.960 variation is a profound example of how cultural 00:30:05.960 --> 00:30:08.599 bias can inadvertently become encoded into a 00:30:08.599 --> 00:30:11.220 system. It really underscores the critical need 00:30:11.220 --> 00:30:13.500 for constant scrutiny in science. Despite the 00:30:13.500 --> 00:30:15.980 scientific and social controversies, Linnaeus 00:30:15.980 --> 00:30:18.869 was celebrated in his lifetime. eventually reaching 00:30:18.869 --> 00:30:21.509 the highest echelon of professional and social 00:30:21.509 --> 00:30:24.289 achievement in Sweden. After returning to Sweden, 00:30:24.450 --> 00:30:27.029 his career ascended rapidly. He was appointed 00:30:27.029 --> 00:30:30.490 professor of medicine at Uppsala in 1741, though 00:30:30.490 --> 00:30:33.150 he quickly exchanged roles to focus on his true 00:30:33.150 --> 00:30:35.769 love botany and managing the botanical garden, 00:30:35.950 --> 00:30:38.730 which he entirely reconstructed. And beyond his 00:30:38.730 --> 00:30:41.369 biological work, he even left his mark on physics. 00:30:41.920 --> 00:30:45.440 He inverted the Celsius scale in 1745. He did. 00:30:45.740 --> 00:30:48.599 When Anders Celsius initially designed his thermometer, 00:30:48.980 --> 00:30:51.299 he set the boiling point of water at 0 degrees 00:30:51.299 --> 00:30:54.829 and the freezing point at 100. Linnaeus found 00:30:54.829 --> 00:30:57.569 this inverted system unwieldy. He argued that 00:30:57.569 --> 00:30:59.549 a higher number should logically correlate with 00:30:59.549 --> 00:31:01.609 a higher or hotter temperature. It just made 00:31:01.609 --> 00:31:03.750 intuitive sense, so he flipped the scale to the 00:31:03.750 --> 00:31:06.609 configuration we use today, 0 degrees C for freezing 00:31:06.609 --> 00:31:09.309 and 100 degrees C for boiling, creating a much 00:31:09.309 --> 00:31:11.430 more pragmatic standard. Honors continued to 00:31:11.430 --> 00:31:13.589 pile up. He was named chief physician by King 00:31:13.589 --> 00:31:16.539 Adolf Frederick. And finally, the ultimate personal 00:31:16.539 --> 00:31:19.200 achievement came in 1757 when he was granted 00:31:19.200 --> 00:31:22.099 nobility by the king. This was formalized in 00:31:22.099 --> 00:31:25.640 1761 when he officially adopted the name Karl 00:31:25.640 --> 00:31:28.319 von Linney. His ennoblement gave him a platform 00:31:28.319 --> 00:31:31.240 to perfectly encapsulate his life's work through 00:31:31.240 --> 00:31:34.039 his coat of arms. It's incredibly symbolic. It's 00:31:34.039 --> 00:31:36.160 a marvelous piece of self -reflection. The Von 00:31:36.160 --> 00:31:38.400 Linnea coat of arms prominently features his 00:31:38.400 --> 00:31:41.839 beloved twin flower, Linnea borealis. The shield 00:31:41.839 --> 00:31:44.420 itself is divided into three fields, red, black, 00:31:44.500 --> 00:31:46.640 and green. Representing the three kingdoms of 00:31:46.640 --> 00:31:48.900 nature, he dedicated his life to classifying. 00:31:49.279 --> 00:31:52.359 Animal, mineral, and vegetable, exactly. And 00:31:52.359 --> 00:31:54.279 the motto he shows was also a powerful statement 00:31:54.279 --> 00:31:58.099 of purpose. We extend our fame by our deeds. 00:31:58.440 --> 00:32:01.180 It was an ambition not reliant on title or birthright, 00:32:01.299 --> 00:32:03.980 but on the tangible, lasting impact of his scientific 00:32:03.980 --> 00:32:06.339 contribution. As he moved toward retirement, 00:32:06.539 --> 00:32:08.480 Uppsala became too noisy and maybe unhealthy 00:32:08.480 --> 00:32:11.500 for him. In 1758, he purchased the Hammerby estate. 00:32:11.859 --> 00:32:14.640 This move was cemented by a very real fear of 00:32:14.640 --> 00:32:17.900 loss. After a fire ravaged Uppsala and threatened 00:32:17.900 --> 00:32:22.460 his home, Linnaeus took action. In 1766, he built 00:32:22.460 --> 00:32:25.319 a dedicated stone museum on a hill at Hammerby, 00:32:25.440 --> 00:32:28.359 specifically to house his extensive library and 00:32:28.359 --> 00:32:31.099 collections, physically separating this priceless 00:32:31.099 --> 00:32:33.140 accumulation of knowledge from the risks of the 00:32:33.140 --> 00:32:35.700 city. But sadly, the final years of his life 00:32:35.700 --> 00:32:38.339 were characterized by a difficult decline. They 00:32:38.339 --> 00:32:40.750 were marked by increasing infirmity. He suffered 00:32:40.750 --> 00:32:43.390 from sciatica, followed by a partially paralyzing 00:32:43.390 --> 00:32:46.490 stroke in 1774. A second, more severe stroke 00:32:46.490 --> 00:32:49.769 in 1776 left him profoundly affected. He had 00:32:49.769 --> 00:32:52.049 partial paralysis and this devastating level 00:32:52.049 --> 00:32:54.509 of memory loss. It's a truly heartbreaking detail 00:32:54.509 --> 00:32:56.849 that he could still hold and admire his own published 00:32:56.849 --> 00:32:59.250 works, his species plantarum or his system in 00:32:59.250 --> 00:33:01.869 atriae, but could no longer recognize himself 00:33:01.869 --> 00:33:04.630 as the author. The irony is just cruel. The mind 00:33:04.630 --> 00:33:06.369 that had organized the entire world lost the 00:33:06.369 --> 00:33:08.630 ability to organize his own identity. He passed 00:33:08.630 --> 00:33:11.829 away on January 10th, 1778, and was interred 00:33:11.829 --> 00:33:14.289 in Uppsala Cathedral. And then the collection 00:33:14.289 --> 00:33:16.750 itself became a scientific drama, a saga that 00:33:16.750 --> 00:33:18.710 ensured its legacy, but also saw it leave Sweden 00:33:18.710 --> 00:33:22.670 entirely. Right. His son, Carl Linnaeus the Younger, 00:33:22.750 --> 00:33:25.769 inherited the whole estate. He tried to preserve 00:33:25.769 --> 00:33:28.589 the material, but he died prematurely just five 00:33:28.589 --> 00:33:30.910 years later, leaving the massive estate in the 00:33:30.910 --> 00:33:33.819 hands of his widow, Sarah. This created an opportunity 00:33:33.819 --> 00:33:36.359 that a young Englishman seized. James Edward 00:33:36.359 --> 00:33:38.940 Smith, a 24 -year -old medical student, heard 00:33:38.940 --> 00:33:41.180 the collection was available. He immediately 00:33:41.180 --> 00:33:43.720 traveled to Sweden and purchased the entire lot 00:33:43.720 --> 00:33:47.000 from Sarah. A staggering collection. 14 ,000 00:33:47.000 --> 00:33:50.720 plant specimens, over 3 ,000 insects, 1 ,600 00:33:50.720 --> 00:33:54.180 books. Thousands of personal letters. For 1 ,000 00:33:54.180 --> 00:33:56.720 guineas, he effectively transported the entire 00:33:56.720 --> 00:33:59.900 foundational archive of modern taxonomy to London. 00:34:00.140 --> 00:34:02.480 And five years later, Smith used this collection 00:34:02.480 --> 00:34:04.920 as the nucleus for founding the Linnean Society 00:34:04.920 --> 00:34:07.640 of London. Which ensured the collection's permanent 00:34:07.640 --> 00:34:09.820 preservation and its role in the global scientific 00:34:09.820 --> 00:34:12.820 community, albeit outside of Sweden. So his achievements 00:34:12.820 --> 00:34:16.000 are just colossal. And his contemporaries immediately 00:34:16.000 --> 00:34:18.579 recognized the magnitude of his work. They did. 00:34:18.840 --> 00:34:21.460 Jean -Jacques Rousseau, the philosopher, famously 00:34:21.460 --> 00:34:24.869 declared, I know no greater man on earth. And 00:34:24.869 --> 00:34:27.510 Johann Wolfgang von Goethe was profoundly influenced 00:34:27.510 --> 00:34:30.469 by him, stating that he knew no one other than 00:34:30.469 --> 00:34:33.349 Shakespeare and Spinoza who had influenced him 00:34:33.349 --> 00:34:36.349 more strongly. Even poets recognize the artistry 00:34:36.349 --> 00:34:38.489 of his organization. Yes. The Swedish author 00:34:38.489 --> 00:34:41.949 August Strindberg characterized him as a poet 00:34:41.949 --> 00:34:44.130 who happened to become a naturalist, acknowledging 00:34:44.130 --> 00:34:46.929 that his system imposed a kind of narrative order 00:34:46.929 --> 00:34:50.289 on nature. And the respect for his system transcends 00:34:50.289 --> 00:34:53.670 time, too. There's a fascinating modern metric, 00:34:53.710 --> 00:34:56.929 a 2015 study that used the PageRank algorithm 00:34:56.929 --> 00:34:59.590 on Wikipedia data to rank historical figures 00:34:59.590 --> 00:35:02.469 by influence. And Linnaeus came out on top, ranked 00:35:02.469 --> 00:35:05.170 as the most influential historical figure, surpassing 00:35:05.170 --> 00:35:07.510 Jesus, Aristotle, Napoleon, and Adolf Hitler. 00:35:07.849 --> 00:35:10.369 The algorithm essentially confirmed that his 00:35:10.369 --> 00:35:13.150 classification system is the single most referenced 00:35:13.150 --> 00:35:15.690 and interconnected structure in the history of 00:35:15.690 --> 00:35:18.420 science. So what's the ultimate takeaway? Despite 00:35:18.420 --> 00:35:20.480 the controversies and the fact that modern science 00:35:20.480 --> 00:35:23.860 has tools like DNA sequencing, why does the Linnaean 00:35:23.860 --> 00:35:26.400 system remain fundamentally sound? Because of 00:35:26.400 --> 00:35:29.400 his genius for organizational simplicity, his 00:35:29.400 --> 00:35:31.639 establishment of universally accepted conventions 00:35:31.639 --> 00:35:35.380 for naming organisms, binomial nomenclature, 00:35:35.400 --> 00:35:38.179 and the nested hierarchy, that is his main and 00:35:38.179 --> 00:35:41.099 most critical contribution. It provides a sound, 00:35:41.119 --> 00:35:44.039 consistent, practical framework for communication. 00:35:44.969 --> 00:35:47.389 We may use genetic data to refine the relationships 00:35:47.389 --> 00:35:50.469 between species, but the basic unit of species 00:35:50.469 --> 00:35:53.289 and genus that Linnaeus formalized remains the 00:35:53.289 --> 00:35:56.170 global language. Exactly. It ensures that any 00:35:56.170 --> 00:35:58.530 two scientists anywhere on the planet can communicate 00:35:58.530 --> 00:36:01.269 clearly about a single organism. The structure 00:36:01.269 --> 00:36:03.570 is just so effective that it transcends the changes 00:36:03.570 --> 00:36:05.670 in the underlying data. That has been our deep 00:36:05.670 --> 00:36:08.170 dive into Carl Linnaeus. He was this force of 00:36:08.170 --> 00:36:10.530 organization who transformed a chaotic jumble 00:36:10.530 --> 00:36:13.449 of descriptive scientific names into a precise, 00:36:13.530 --> 00:36:15.889 concise, and global language. His work enabled 00:36:15.889 --> 00:36:18.570 global exploration through his apostles and formed 00:36:18.570 --> 00:36:20.889 the very basis for modern ecological understanding. 00:36:21.289 --> 00:36:24.500 His greatest deed was providing clarity. He managed 00:36:24.500 --> 00:36:27.019 to impose order on the almost overwhelming diversity 00:36:27.019 --> 00:36:29.840 of life, moving us from these unwieldy paragraph 00:36:29.840 --> 00:36:32.599 -long descriptors to functional two -word labels 00:36:32.599 --> 00:36:35.329 that transcend language and nationality. He defined 00:36:35.329 --> 00:36:37.769 the rules of the game for natural history, and 00:36:37.769 --> 00:36:40.489 that framework persists because it's just inherently 00:36:40.489 --> 00:36:42.510 efficient. And if you want to understand the 00:36:42.510 --> 00:36:45.250 man's philosophy, his ultimate respect for the 00:36:45.250 --> 00:36:48.010 perpetual nature of life, you just have to return 00:36:48.010 --> 00:36:50.769 to his coat of arms. When he was ennobled, he 00:36:50.769 --> 00:36:53.329 chose to place a fascinating piece of symbolism 00:36:53.329 --> 00:36:56.590 right in the center of that shield, surrounded 00:36:56.590 --> 00:37:00.070 by the three kingdoms of nature, an egg. And 00:37:00.070 --> 00:37:02.309 the motto inscribed around it explained the symbolism. 00:37:03.099 --> 00:37:06.539 to denote nature, which is continued and perpetuated 00:37:06.539 --> 00:37:10.280 in ovo. That phrase, in ovo, within the egg, 00:37:10.380 --> 00:37:13.159 acknowledges that the sheer, continuous creative 00:37:13.159 --> 00:37:16.599 force of life is always ongoing. The order he 00:37:16.599 --> 00:37:18.980 established is ultimately rooted in the continuous 00:37:18.980 --> 00:37:21.800 cycle and renewal of life itself. So the system 00:37:21.800 --> 00:37:23.739 is permanent, but the subjects of that system 00:37:23.739 --> 00:37:26.500 are in constant creative chaos. Which means the 00:37:26.500 --> 00:37:29.019 task of classification is therefore never truly 00:37:29.019 --> 00:37:31.760 finished. So as you reflect on the sheer continuous 00:37:31.760 --> 00:37:34.000 perpetuation of nature, the things that continue 00:37:34.000 --> 00:37:36.480 to reproduce in Ovo, what part of the world, 00:37:36.579 --> 00:37:39.500 left unclassified by him, do you think is next 00:37:39.500 --> 00:37:42.480 to benefit from a deeper, more Linnaean understanding? 00:37:42.880 --> 00:37:43.820 We'll leave you with that thought.