WEBVTT 00:00:00.000 --> 00:00:02.240 Welcome back to the deep dive. Today we're taking 00:00:02.240 --> 00:00:05.400 on a figure so large he didn't just shape a field. 00:00:05.599 --> 00:00:08.759 He he basically created the rule book for half 00:00:08.759 --> 00:00:11.080 the disciplines we study. It's a huge task. A 00:00:11.080 --> 00:00:14.199 huge task. We're doing a deep dive into the sources 00:00:14.199 --> 00:00:16.879 on Aristotle. I mean this is the polymath who 00:00:16.879 --> 00:00:19.719 essentially invented the foundations for logic 00:00:19.719 --> 00:00:23.949 biology ethics politics. Things we still absolutely 00:00:23.949 --> 00:00:26.489 rely on. It's a monumental undertaking for sure. 00:00:26.829 --> 00:00:30.250 The mission for this deep dive really is to distill 00:00:30.250 --> 00:00:33.990 the core insights from his surviving works. We 00:00:33.990 --> 00:00:35.729 want to give you a kind of fast -tracked understanding 00:00:35.729 --> 00:00:38.890 why he was just called the philosopher for centuries. 00:00:39.229 --> 00:00:41.770 Right. And how his frameworks, these ancient 00:00:41.770 --> 00:00:45.170 ideas, still form the backbone of modern science 00:00:45.170 --> 00:00:47.289 and how we even structure an argument. Exactly. 00:00:47.329 --> 00:00:49.149 We're moving beyond just a history lesson here. 00:00:49.210 --> 00:00:51.829 We really want to find those. Aha! Moments. The 00:00:51.829 --> 00:00:53.450 moments where you see exactly how the structure 00:00:53.450 --> 00:00:55.649 of his mind influences how you think, how you 00:00:55.649 --> 00:00:59.229 argue, and how you categorize the world around 00:00:59.229 --> 00:01:01.429 you, even today. Okay, so where do we start? 00:01:01.590 --> 00:01:03.869 The life seems essential. Let's unpack the life 00:01:03.869 --> 00:01:06.609 first, because the context is everything. This 00:01:06.609 --> 00:01:09.569 was not some isolated academic in an ivory tower. 00:01:09.829 --> 00:01:13.329 This was a man whose entire life was woven into 00:01:13.329 --> 00:01:16.209 the greatest geopolitical power of his time, 00:01:16.689 --> 00:01:20.609 Macedon. He was born in 384 B .C. in a town called 00:01:20.609 --> 00:01:24.010 Stagira in northern Greece. And this area had 00:01:24.010 --> 00:01:26.790 incredibly close ties to the Macedonian royals. 00:01:26.890 --> 00:01:29.129 And his family connection is the key, right? 00:01:29.189 --> 00:01:31.489 It's the absolute key. His father, Nicomachus, 00:01:31.689 --> 00:01:33.750 was the personal physician to King Amentus of 00:01:33.750 --> 00:01:37.310 Macedon. That's not just a small detail. So what 00:01:37.310 --> 00:01:39.629 does that connection, that royal court connection, 00:01:39.810 --> 00:01:42.329 actually mean for his intellectual development? 00:01:42.469 --> 00:01:44.370 I mean, especially with the medicine. Well, it's 00:01:44.370 --> 00:01:47.989 crucial. It didn't just give him status. It plunged 00:01:47.989 --> 00:01:50.230 him into this culture of observation of empirical 00:01:50.230 --> 00:01:52.790 learning that you'd find at the court. It's almost 00:01:52.790 --> 00:01:55.109 certain that this connection, you know, his father 00:01:55.109 --> 00:01:57.670 being part of this medical guild, is what sparked 00:01:57.670 --> 00:02:00.370 Aristotle's deep early interest in biology and 00:02:00.370 --> 00:02:03.129 medicine. And that link to Macedon. It follows 00:02:03.129 --> 00:02:05.450 him his entire life. It's a foundational element. 00:02:05.569 --> 00:02:08.449 It shapes his opportunities. And in the end, 00:02:08.449 --> 00:02:10.629 it's what forces him to flee for his life. Which 00:02:10.629 --> 00:02:13.229 sets him up perfectly for his next huge chapter. 00:02:13.509 --> 00:02:16.409 He goes to Athens and spends, what, nearly two 00:02:16.409 --> 00:02:18.530 decades at Plato's Academy? Almost 20 years. 00:02:18.770 --> 00:02:22.289 He gets there when he's about 17 or 18 and stays 00:02:22.289 --> 00:02:26.810 right up until 347 BC. And he wasn't just any 00:02:26.810 --> 00:02:28.449 student. He must have been something special. 00:02:28.689 --> 00:02:31.629 Oh, absolutely. The sources say that Plato himself 00:02:31.629 --> 00:02:34.090 called him the mind of the school. He was a top 00:02:34.090 --> 00:02:37.150 student, a researcher, a lecturer. He was completely 00:02:37.150 --> 00:02:40.430 immersed in that world for two decades. It shaped 00:02:40.430 --> 00:02:43.310 everything. So after all that time, literally 00:02:43.310 --> 00:02:45.870 growing up intellectually in the shadow of Plato, 00:02:46.069 --> 00:02:49.009 why does he suddenly leave Athens right after 00:02:49.009 --> 00:02:51.509 Plato dies? There are a couple of big reasons, 00:02:51.629 --> 00:02:53.710 and they probably work together. The first is 00:02:53.710 --> 00:02:56.150 philosophical. A disagreement. Yeah, a disagreement 00:02:56.150 --> 00:02:58.500 with a new direction of the academy. Leadership 00:02:58.500 --> 00:03:01.780 went to Plato's nephew, Spisippus, who put a 00:03:01.780 --> 00:03:04.139 huge emphasis on mathematics and, you know, pushed 00:03:04.139 --> 00:03:06.340 Plato's forms into even more abstract territory. 00:03:06.639 --> 00:03:09.319 Aristotle was already moving in a more empirical, 00:03:09.520 --> 00:03:11.639 a more grounded direction. And the other reason 00:03:11.639 --> 00:03:14.080 was political. It always comes back to Macedon. 00:03:14.159 --> 00:03:17.580 Always. Philip II of Macedon was expanding his 00:03:17.580 --> 00:03:20.319 power across Greece at this time. And Athens 00:03:20.319 --> 00:03:24.479 was, let's just say, not happy about it. Anti 00:03:24.479 --> 00:03:27.110 -Macedonian sentiment was boiling over. So it 00:03:27.110 --> 00:03:29.509 was dangerous for him. Becoming very dangerous 00:03:29.509 --> 00:03:32.530 for a known Macedonian ally to stay in the city. 00:03:32.669 --> 00:03:35.349 So he left for Assos over in Asia Minor. But 00:03:35.349 --> 00:03:37.009 he doesn't just sit around. This is where he 00:03:37.009 --> 00:03:39.030 really leans into his own research, right? That's 00:03:39.030 --> 00:03:41.870 right. In Assos and then on the island of Lesbos, 00:03:41.909 --> 00:03:44.860 he and his colleague Theophrastus just... dove 00:03:44.860 --> 00:03:47.379 into this massive research project in botany 00:03:47.379 --> 00:03:49.939 and marine biology. This period was absolutely 00:03:49.939 --> 00:03:51.919 critical for his development as a scientist. 00:03:52.199 --> 00:03:54.159 It's where he built that observational foundation 00:03:54.159 --> 00:03:56.560 for all his later biological works. And then 00:03:56.560 --> 00:03:58.840 comes the job he's most famous for. Tutoring 00:03:58.840 --> 00:04:00.879 the future Alexander the Great. An invitation 00:04:00.879 --> 00:04:05.240 from Philip II himself in 343 BC. He wants Aristotle 00:04:05.240 --> 00:04:07.620 to come back and teach his 13 -year -old son. 00:04:07.939 --> 00:04:10.379 It just confirms how important that family connection 00:04:10.379 --> 00:04:13.120 to the dynasty was. It never went away. So what 00:04:13.120 --> 00:04:15.060 on earth do you teach the boy who's going to 00:04:15.060 --> 00:04:17.399 conquer the known world? That has to be the most 00:04:17.399 --> 00:04:20.360 high stakes curriculum of all time. It was incredibly 00:04:20.360 --> 00:04:23.339 intense. We know it covered ethics, politics, 00:04:23.759 --> 00:04:27.220 the classic literary texts. One of the best details 00:04:27.220 --> 00:04:29.879 is that he gave Alexander a personally annotated 00:04:29.879 --> 00:04:33.740 copy of Homer's Iliad. Oh. And Alexander supposedly 00:04:33.740 --> 00:04:36.139 treasured it, carried it with him on all his 00:04:36.139 --> 00:04:38.959 campaigns. The school itself was a private place 00:04:38.959 --> 00:04:42.300 called Mieza. set up just for Alexander, although 00:04:42.300 --> 00:04:44.339 some other nobles would have sat in on those 00:04:44.339 --> 00:04:46.779 lectures too. Future generals like Ptolemy and 00:04:46.779 --> 00:04:49.819 Cassander. Exactly. Imagine that classroom. Now, 00:04:49.860 --> 00:04:51.939 there's a pretty heavy ethical side to this. 00:04:52.100 --> 00:04:54.800 What kind of advice does Aristotle give this 00:04:54.800 --> 00:04:57.079 future conqueror about how to rule different 00:04:57.079 --> 00:04:59.240 kinds of people? This is where it gets really 00:04:59.240 --> 00:05:01.319 complex, and you can see the biases of the era 00:05:01.319 --> 00:05:04.259 so clearly. The sources say Aristotle encouraged 00:05:04.259 --> 00:05:06.920 the Eastern conquest, but with a very divided 00:05:06.920 --> 00:05:10.800 mindset. How so? He advised Alexander to be a 00:05:10.800 --> 00:05:13.560 leader to the Greeks and a despot to the barbarians. 00:05:13.779 --> 00:05:17.319 Wow. That's blunt. It is. It highlights this 00:05:17.319 --> 00:05:21.120 sharp ethnocentric line in his thinking. There's 00:05:21.120 --> 00:05:23.220 the Greek world, which you govern with politics 00:05:23.220 --> 00:05:25.139 and partnership, and then there's the non -Greek 00:05:25.139 --> 00:05:29.139 world, which you just control. That advice definitely 00:05:29.139 --> 00:05:31.860 gave a philosophical green light for Alexander's 00:05:31.860 --> 00:05:34.339 initial campaigns, even if Alexander himself 00:05:34.339 --> 00:05:36.500 eventually moved past it. Okay, so Alexander 00:05:36.500 --> 00:05:40.110 takes the throne. And Aristotle eventually heads 00:05:40.110 --> 00:05:43.370 back to Athens in 335 B .C. But he's still a 00:05:43.370 --> 00:05:45.629 foreigner there, a medic. Right. Which meant 00:05:45.629 --> 00:05:48.310 he couldn't legally own property. So he rented 00:05:48.310 --> 00:05:50.550 a space at the Lyceum. It was a public gymnasium 00:05:50.550 --> 00:05:53.449 and had these famous covered walkways. A peripatos. 00:05:53.750 --> 00:05:55.769 Exactly. And that's where his school gets its 00:05:55.769 --> 00:05:58.110 name. His followers became known as the peripatetics, 00:05:58.170 --> 00:06:00.149 the ones who walk about. And he spends the next 00:06:00.149 --> 00:06:02.470 12 years there. And it's an incredibly productive 00:06:02.470 --> 00:06:05.709 time. What made the Lyceum so special? It was 00:06:05.709 --> 00:06:07.610 basically the prototype for a modern research 00:06:07.610 --> 00:06:10.470 institute. Aristotle was so systematic, he built 00:06:10.470 --> 00:06:13.649 this huge library of manuscripts, maps, all sorts 00:06:13.649 --> 00:06:15.870 of objects for study. It was a real museum of 00:06:15.870 --> 00:06:17.769 knowledge. He ran the school, he did his own 00:06:17.769 --> 00:06:19.910 research, and he lectured to these small groups 00:06:19.910 --> 00:06:22.649 of very serious students. Which brings us to 00:06:22.649 --> 00:06:24.949 the works themselves. This is one of the most 00:06:24.949 --> 00:06:26.610 surprising things I learned from the sources. 00:06:26.810 --> 00:06:29.170 The books we have, the physics, the metaphysics, 00:06:29.250 --> 00:06:31.970 the ethics, they were never meant for us to read. 00:06:32.329 --> 00:06:34.829 It is absolutely critical to understand this. 00:06:34.970 --> 00:06:38.129 They were not intended for widespread publication. 00:06:38.449 --> 00:06:42.189 The majority of what survived are his esoteric 00:06:42.189 --> 00:06:44.509 works. Meaning? Meaning they were internal school 00:06:44.509 --> 00:06:46.810 materials. They were probably his own lecture 00:06:46.810 --> 00:06:49.209 aids or maybe even notes taken by his students. 00:06:49.250 --> 00:06:51.250 They're dense. They're technical. They're not 00:06:51.250 --> 00:06:54.300 polished. And all his popular stuff, the dialogues 00:06:54.300 --> 00:06:56.980 he wrote for the public, are mostly lost. Mostly 00:06:56.980 --> 00:06:58.819 lost. We only have about a third of everything 00:06:58.819 --> 00:07:00.639 he wrote, and what we have is the technical, 00:07:00.839 --> 00:07:03.759 philosophical core. That explains why it reads 00:07:03.759 --> 00:07:06.000 like a curriculum. Because it was a curriculum. 00:07:06.240 --> 00:07:08.980 Now, despite that close relationship early on, 00:07:09.220 --> 00:07:11.420 Aristotle and his former student, Alexander, 00:07:11.899 --> 00:07:15.240 they grow apart. What was the final break? Their 00:07:15.240 --> 00:07:17.180 views just diverged too dramatically on how the 00:07:17.180 --> 00:07:19.649 empire should be run. Aristotle's very Greek 00:07:19.649 --> 00:07:22.230 -centric advice really clashed with Alexander's 00:07:22.230 --> 00:07:25.990 growing desire to integrate Persian culture and 00:07:25.990 --> 00:07:28.389 people into his administration. Alexander became 00:07:28.389 --> 00:07:31.149 more cosmopolitan than his teacher. Much more. 00:07:31.449 --> 00:07:34.290 They also disagreed on how to govern city -states, 00:07:34.329 --> 00:07:38.459 even on philosophical ideas about virtue. Alexander's 00:07:38.459 --> 00:07:41.079 path just grew far beyond what Aristotle had 00:07:41.079 --> 00:07:43.459 advised. And then when Alexander dies suddenly 00:07:43.459 --> 00:07:47.399 in 323 BC, it's like history repeating itself 00:07:47.399 --> 00:07:50.060 for Aristotle in Athens. The anti -Macedonian 00:07:50.060 --> 00:07:53.139 backlash was immediate and violent. A charge 00:07:53.139 --> 00:07:55.379 of impiety was trumped up against him, just like 00:07:55.379 --> 00:07:57.980 with Socrates. So he had to flee? He fled to 00:07:57.980 --> 00:08:00.759 his mother's family estate in Chalcis. And that's 00:08:00.759 --> 00:08:03.060 where he delivered that incredible line referencing 00:08:03.060 --> 00:08:05.980 Socrates' execution. I will not allow the Athenians 00:08:05.980 --> 00:08:08.519 to sin twice against philosophy. He died there 00:08:08.519 --> 00:08:11.160 a little later of natural causes. But the story 00:08:11.160 --> 00:08:14.100 of what happened to his writings. It's a miracle 00:08:14.100 --> 00:08:16.819 they even exist. It really is. He left his works 00:08:16.819 --> 00:08:19.600 to his successor, Theophrastus. From there, they 00:08:19.600 --> 00:08:21.139 were passed down, and at one point, according 00:08:21.139 --> 00:08:23.180 to the story, they were hidden in a damp cellar 00:08:23.180 --> 00:08:25.259 to protect them. Yeah. For a long, long time. 00:08:25.399 --> 00:08:28.040 They weren't properly compiled, edited, and published 00:08:28.040 --> 00:08:30.779 into the cohesive books we know today until the 00:08:30.779 --> 00:08:33.779 first century B .C. by a scholar named Andronicus 00:08:33.779 --> 00:08:36.779 of Rhodes. That's almost 300 years after Aristotle 00:08:36.779 --> 00:08:40.460 died. An unbelievable journey. A miracle that 00:08:40.460 --> 00:08:43.080 those lecture notes survived. And what survived 00:08:43.080 --> 00:08:45.980 became the blueprint for, well, almost everything. 00:08:46.759 --> 00:08:49.259 So let's shift from the life to the philosophy 00:08:49.259 --> 00:08:51.899 itself, starting with the very rules of how to 00:08:51.899 --> 00:08:54.460 think. He is credited with the first systematic 00:08:54.460 --> 00:08:57.960 study of logic. It's almost impossible to overstate 00:08:57.960 --> 00:09:00.860 how influential this was. His system was the 00:09:00.860 --> 00:09:02.820 system of logic in the West right up until the 00:09:02.820 --> 00:09:05.320 19th century. The sources mention that 2 ,000 00:09:05.320 --> 00:09:07.759 years later, Immanuel Kant basically said that 00:09:07.759 --> 00:09:09.820 logic was a completed science with Aristotle, 00:09:10.019 --> 00:09:12.899 as in he'd finished it. That's a staggering claim. 00:09:13.139 --> 00:09:14.980 It just shows you how perfect and exhaustive 00:09:14.980 --> 00:09:17.659 his system was considered to be. The collection 00:09:17.659 --> 00:09:20.340 of his logical works is called the Organon. Which 00:09:20.340 --> 00:09:23.620 means the tool. Exactly. The name was given later, 00:09:23.700 --> 00:09:26.840 but it's perfect. Logic is the tool you use to 00:09:26.840 --> 00:09:29.779 analyze everything else. And the six books of 00:09:29.779 --> 00:09:33.279 the Organon lay out the entire process, from 00:09:33.279 --> 00:09:35.820 the simplest building blocks all the way up to 00:09:35.820 --> 00:09:38.159 complex arguments. Okay, so walk us through that 00:09:38.159 --> 00:09:40.259 structure. It's like building a disciplined mind 00:09:40.259 --> 00:09:42.659 from the ground up. Where does it start? It starts 00:09:42.659 --> 00:09:44.620 with the absolute basics and the categories. 00:09:45.059 --> 00:09:47.580 This deals with simple terms, things like substance, 00:09:47.820 --> 00:09:50.419 quantity, quality, the fundamental ways you can 00:09:50.419 --> 00:09:53.019 describe something. And then? Then comes on interpretation. 00:09:53.799 --> 00:09:56.299 Which is about how you combine those terms into 00:09:56.299 --> 00:09:59.100 propositions, into statements that can be true 00:09:59.100 --> 00:10:01.720 or false. And how those statements relate to 00:10:01.720 --> 00:10:03.460 each other, like through contradiction. And from 00:10:03.460 --> 00:10:05.480 there, we get to the real engine of the whole 00:10:05.480 --> 00:10:07.899 system. The core method. That's in the prior 00:10:07.899 --> 00:10:09.960 analytics, which is all about the syllogism, 00:10:10.080 --> 00:10:12.679 the structure of argument itself. And then the 00:10:12.679 --> 00:10:14.440 poster analytics, which is about demonstration. 00:10:15.080 --> 00:10:19.120 About what counts as real, solid knowledge. And 00:10:19.120 --> 00:10:21.460 the last couple of books are about applying these 00:10:21.460 --> 00:10:24.500 rules in the real world. in debates. Precisely. 00:10:24.500 --> 00:10:27.580 The Topics is about dialectics, how to have a 00:10:27.580 --> 00:10:31.500 rigorous debate, and On Sophistical Refutations 00:10:31.500 --> 00:10:35.980 is basically a field guide to spotting and dismantling 00:10:35.980 --> 00:10:38.259 bad arguments. And I mentioned an important distinction. 00:10:38.620 --> 00:10:40.980 Aristotle didn't call his formal system logic. 00:10:41.559 --> 00:10:44.059 No, he reserved the word logic for the broader 00:10:44.059 --> 00:10:46.700 practice of dialectic or debate. He called his 00:10:46.700 --> 00:10:49.600 rigorous formal method analytics. That shows 00:10:49.600 --> 00:10:52.080 you how focused he was on the scientific precision 00:10:52.080 --> 00:10:54.899 of deduction. And the heart of that method, the 00:10:54.899 --> 00:10:57.620 thing that defined logic for centuries, is the 00:10:57.620 --> 00:10:59.419 syllogism. Let's break that down because it's 00:10:59.419 --> 00:11:01.720 really the DNA of deductive reasoning. A syllogism 00:11:01.720 --> 00:11:04.460 is a logical argument where you take two statements 00:11:04.460 --> 00:11:07.179 or premises that you accept as true and you use 00:11:07.179 --> 00:11:08.759 them to reach a conclusion that is necessarily 00:11:08.759 --> 00:11:11.990 true. It has three terms. A major term, a minor 00:11:11.990 --> 00:11:14.129 term, and a middle term that links them. Give 00:11:14.129 --> 00:11:16.309 us the classic example. The classic one, Barbara, 00:11:16.429 --> 00:11:18.190 goes like this. Premise one, all men are mortal. 00:11:18.490 --> 00:11:21.029 Premise two, all Greeks are men. Conclusion. 00:11:21.110 --> 00:11:23.669 Therefore, all Greeks are mortal. The power of 00:11:23.669 --> 00:11:25.710 it is that if your two premises are true, the 00:11:25.710 --> 00:11:28.190 conclusion has to be true. It's inescapable. 00:11:28.509 --> 00:11:30.929 That structure is the bedrock of so much formal 00:11:30.929 --> 00:11:33.809 reasoning. But he went beyond just making correct 00:11:33.809 --> 00:11:35.950 arguments. He wanted to know what makes knowledge 00:11:35.950 --> 00:11:38.690 real. Yes, that's what demonstration is all about 00:11:38.690 --> 00:11:41.669 in the posterior analytics. For Aristotle, demonstration 00:11:41.669 --> 00:11:44.529 isn't just showing that something is true. It's 00:11:44.529 --> 00:11:47.929 showing why it must be true. It means you understand 00:11:47.929 --> 00:11:50.210 its underlying causes. So once he's established 00:11:50.210 --> 00:11:52.990 the rules for argument, he turns to the rules 00:11:52.990 --> 00:11:56.519 for... Well, existence itself, the field we call 00:11:56.519 --> 00:11:58.860 metaphysics. Right. But he didn't call it that. 00:11:58.980 --> 00:12:01.940 That name came later from a librarian who just 00:12:01.940 --> 00:12:04.720 shelved those books, Metaphysica, after the physics. 00:12:04.960 --> 00:12:07.080 So what did he call it? He called it first philosophy, 00:12:07.220 --> 00:12:10.559 or sometimes theology, and he defined it as the 00:12:10.559 --> 00:12:14.080 study of being qua being. Meaning? meaning the 00:12:14.080 --> 00:12:17.259 study of existence just as existence. It asks 00:12:17.259 --> 00:12:19.159 the most fundamental questions. What does it 00:12:19.159 --> 00:12:21.700 mean for something to be? This branch of philosophy 00:12:21.700 --> 00:12:24.919 looks at what is eternal, unchanging, and not 00:12:24.919 --> 00:12:26.799 made of matter. And the fundamental building 00:12:26.799 --> 00:12:29.120 block of his reality is the idea of substance, 00:12:29.360 --> 00:12:32.440 or ushia. Yes, and his theory of substance is 00:12:32.440 --> 00:12:35.779 revolutionary. He says that any particular thing, 00:12:35.879 --> 00:12:38.379 this table, that tree, isn't just one thing. 00:12:38.480 --> 00:12:41.529 It's a combination of two things. Matter. And 00:12:41.529 --> 00:12:44.850 this theory is called hylomorphism. Hylomorphism. 00:12:44.929 --> 00:12:47.490 From the Greek for matter and form. Exactly. 00:12:47.690 --> 00:12:50.110 The matter is the physical stuff, the raw material, 00:12:50.250 --> 00:12:52.429 the potential. The form is the blueprint, the 00:12:52.429 --> 00:12:54.889 essence, the actuality. It's the definition of 00:12:54.889 --> 00:12:56.870 what the thing is. Let's use the house example 00:12:56.870 --> 00:12:59.590 to make that concrete. Okay, a house. The matter 00:12:59.590 --> 00:13:02.450 is the bricks, the wood, the stones. All the 00:13:02.450 --> 00:13:05.049 physical stuff that is potentially a house. The 00:13:05.049 --> 00:13:07.549 form is the design, the arrangement, the definition. 00:13:08.720 --> 00:13:12.080 A shelter for people and property. It's not material. 00:13:12.299 --> 00:13:14.539 The form is what makes that pile of bricks an 00:13:14.539 --> 00:13:16.220 actual house. And you can't have one without 00:13:16.220 --> 00:13:19.399 the other. In a physical object, no. The form 00:13:19.399 --> 00:13:21.399 is inseparable from the matter. It's what gives 00:13:21.399 --> 00:13:23.480 the matter its structure and its purpose. And 00:13:23.480 --> 00:13:25.639 this is the great philosophical divorce from 00:13:25.639 --> 00:13:27.840 his teacher, Plato. You see it on that famous 00:13:27.840 --> 00:13:30.299 painting, The School of Athens. Plato pointing 00:13:30.299 --> 00:13:33.080 up, Aristotle gesturing down. That Frisco captures 00:13:33.080 --> 00:13:36.690 it perfectly. They were both searching for universals 00:13:36.690 --> 00:13:40.570 concepts like justice or beauty or, you know, 00:13:40.590 --> 00:13:42.789 apple -ness. But they looked in completely different 00:13:42.789 --> 00:13:45.590 places. For Plato, the forms were more real than 00:13:45.590 --> 00:13:48.669 actual objects. They existed in a separate heavenly 00:13:48.669 --> 00:13:52.789 realm of pure ideas. So he points up. But Aristotle 00:13:52.789 --> 00:13:55.269 yanks it all back down to Earth. He was a moderate 00:13:55.269 --> 00:13:57.769 realist. He argued that universals are real, 00:13:57.850 --> 00:14:00.190 but they only exist when they're instantiated 00:14:00.190 --> 00:14:02.960 in a particular thing. The form of apple exists 00:14:02.960 --> 00:14:05.340 inside every single apple. It doesn't float around 00:14:05.340 --> 00:14:07.279 in some other dimension. That's why he gestures 00:14:07.279 --> 00:14:10.240 down. Knowledge comes from observing the particulars 00:14:10.240 --> 00:14:12.240 right here in the world. That one image really 00:14:12.240 --> 00:14:15.659 shows the split between idealism and the kind 00:14:15.659 --> 00:14:18.159 of empiricism that leads to science. It's a fundamental 00:14:18.159 --> 00:14:20.759 split we're still dealing with today. So if a 00:14:20.759 --> 00:14:23.059 substance is a combination of form and matter, 00:14:23.220 --> 00:14:26.360 how does he explain change? How does an acorn 00:14:26.360 --> 00:14:28.799 become an oak tree? He does it with two brilliant 00:14:28.799 --> 00:14:33.809 concepts. potentiality, or dynamis, and actuality, 00:14:33.830 --> 00:14:36.970 or entelechia. He starts by breaking down the 00:14:36.970 --> 00:14:39.610 different kinds of change. There's growth, there's 00:14:39.610 --> 00:14:42.230 moving from one place to another, there's changing 00:14:42.230 --> 00:14:44.090 quality, and then there's coming into being, 00:14:44.250 --> 00:14:47.570 or generation. Okay, so how do potentiality and 00:14:47.570 --> 00:14:51.029 actuality drive that process? Potentiality is 00:14:51.029 --> 00:14:53.870 what something is capable of becoming, if the 00:14:53.870 --> 00:14:56.909 conditions are right. An acorn is potentially 00:14:56.909 --> 00:14:59.080 an oak tree. A block of marble is potentially 00:14:59.080 --> 00:15:01.200 a statue. This could be an innate potential, 00:15:01.419 --> 00:15:03.980 like an eye having the ability to see or a learned 00:15:03.980 --> 00:15:05.620 one, like knowing how to play the flute. And 00:15:05.620 --> 00:15:08.279 actuality is the end result, the fulfillment 00:15:08.279 --> 00:15:10.259 of that potential. Exactly. It's the finished 00:15:10.259 --> 00:15:13.019 state, which is also the thing's purpose or telos. 00:15:13.320 --> 00:15:15.460 But here's the crucial part, and it seems a little 00:15:15.460 --> 00:15:18.500 backward at first. Aristotle argues that actuality 00:15:18.500 --> 00:15:21.259 is prior to potentiality. How can the finished 00:15:21.259 --> 00:15:23.659 thing come before the potential? It's prior in 00:15:23.659 --> 00:15:26.120 logic, not necessarily in time. The end goal, 00:15:26.259 --> 00:15:28.399 the actuality, is what defines the potential 00:15:28.399 --> 00:15:31.179 in the first place. His famous line is, animals 00:15:31.179 --> 00:15:33.600 do not see in order that they may have sight, 00:15:33.740 --> 00:15:36.820 but they have sight that they may see. Ah, so 00:15:36.820 --> 00:15:39.059 the act of seeing is the purpose that defines 00:15:39.059 --> 00:15:42.220 the potential of the eye. Precisely. The activity, 00:15:42.440 --> 00:15:45.379 the actuality, defines a potential. The final 00:15:45.379 --> 00:15:47.740 form of the house is what gives the pile of timber 00:15:47.740 --> 00:15:51.090 its potentiality as building material. It's an 00:15:51.090 --> 00:15:53.809 incredibly elegant way to explain change while 00:15:53.809 --> 00:15:56.269 keeping the form central. That's a perfect transition 00:15:56.269 --> 00:15:59.230 point from his abstract philosophy to his work 00:15:59.230 --> 00:16:01.269 on the physical world. This is where logic becomes 00:16:01.269 --> 00:16:04.090 physics. Yes, his natural philosophy. This was 00:16:04.090 --> 00:16:06.029 a huge category for him. It covered everything 00:16:06.029 --> 00:16:09.110 we now call physics, biology, all the natural 00:16:09.110 --> 00:16:11.649 sciences. He saw it as a theoretical science 00:16:11.649 --> 00:16:13.929 knowledge for its own sake. And he starts with 00:16:13.929 --> 00:16:16.210 the basic building blocks of the world. He takes 00:16:16.210 --> 00:16:18.490 the four elements from Empedocles' earth, water, 00:16:18.649 --> 00:16:21.769 air, and fire. But he systemizes them. He links 00:16:21.769 --> 00:16:25.669 them to qualities. Hot, cold, wet, dry. So Earth 00:16:25.669 --> 00:16:27.649 is cold and dry, fire is hot and dry, and so 00:16:27.649 --> 00:16:30.190 on. That covered the terrestrial world. But his 00:16:30.190 --> 00:16:33.149 big addition was a fifth element. Aether. Aether, 00:16:33.269 --> 00:16:36.309 the divine, perfect, unchanging substance of 00:16:36.309 --> 00:16:38.730 the heavens. The stars, the planets, they were 00:16:38.730 --> 00:16:40.669 all made of aether. And this elemental theory 00:16:40.669 --> 00:16:43.470 directly leads to his theory of motion. It does. 00:16:43.889 --> 00:16:46.750 He proposed two kinds of motion, natural and 00:16:46.750 --> 00:16:49.409 violent. Natural motion is just each element 00:16:49.409 --> 00:16:51.570 trying to get back to its proper place. So rocks 00:16:51.570 --> 00:16:54.330 fall and smoke rises. Right. Earth and water 00:16:54.330 --> 00:16:56.230 move down toward the center of the universe. 00:16:56.529 --> 00:16:59.669 Fire and air move up. And aether, being perfect, 00:16:59.889 --> 00:17:02.470 moves in a perfect circle. That's why the planets 00:17:02.470 --> 00:17:04.950 circle the Earth in his model. And violent motion. 00:17:05.430 --> 00:17:07.750 That's any motion caused by an outside force. 00:17:08.230 --> 00:17:11.789 Pushing a cart, throwing a stone. The key idea 00:17:11.789 --> 00:17:13.849 here, which is very different from our modern 00:17:13.849 --> 00:17:16.049 view, is that the natural state of an object 00:17:16.049 --> 00:17:18.960 is to be at rest. So motion stops the second 00:17:18.960 --> 00:17:21.680 you stop pushing. Exactly. Which created a problem. 00:17:21.839 --> 00:17:24.259 How does a thrown spear keep flying after it 00:17:24.259 --> 00:17:26.279 leaves your hand? He had to come up with this 00:17:26.279 --> 00:17:29.740 slightly awkward idea that the air was rushing 00:17:29.740 --> 00:17:31.740 around behind it and pushing it along. That's 00:17:31.740 --> 00:17:33.619 a theory that was challenged later on, but his 00:17:33.619 --> 00:17:35.680 theory on falling objects is probably his most 00:17:35.680 --> 00:17:38.519 famous mistake. Right. The one Galileo supposedly 00:17:38.519 --> 00:17:41.940 disproved from the Tower of Pisa. Aristotle stated 00:17:41.940 --> 00:17:44.859 a quantitative law that the speed of a falling 00:17:44.859 --> 00:17:47.859 object is proportional to its weight. and inversely 00:17:47.859 --> 00:17:49.859 proportional to the density of the medium it's 00:17:49.859 --> 00:17:52.140 falling through. Okay, so a heavier object falls 00:17:52.140 --> 00:17:54.819 faster, and this led him to his conclusion about 00:17:54.819 --> 00:17:58.799 the vacuum. The vacuum deduction, yes. He reasoned 00:17:58.799 --> 00:18:01.779 that if his law was true, an object falling in 00:18:01.779 --> 00:18:05.000 a vacuum where the density is zero would have 00:18:05.000 --> 00:18:07.859 to move at an infinite speed. Which is an absurdity. 00:18:07.980 --> 00:18:10.980 Therefore, a vacuum is impossible. Right. Horror 00:18:10.980 --> 00:18:13.500 vacui. Now, of course, we know that in a vacuum, 00:18:13.559 --> 00:18:15.660 a feather and a cannonball fall at the same rate. 00:18:15.819 --> 00:18:18.140 But here's the modern, more charitable take. 00:18:18.339 --> 00:18:20.759 There's a nuance here. There is. Some physicists 00:18:20.759 --> 00:18:22.900 argue that Aristotle's model is actually a pretty 00:18:22.900 --> 00:18:24.920 good description for the specific domain he was 00:18:24.920 --> 00:18:28.200 observing. Objects falling through a fluid, like 00:18:28.200 --> 00:18:31.190 air or water. In that context where you have 00:18:31.190 --> 00:18:34.190 air resistance, a heavier object does fall faster 00:18:34.190 --> 00:18:36.170 than a lighter one of the same shape. So it wasn't 00:18:36.170 --> 00:18:38.230 wrong, it was just incomplete. A model with a 00:18:38.230 --> 00:18:40.970 limited application. Exactly. It was based on 00:18:40.970 --> 00:18:42.690 careful observation of the world as he could 00:18:42.690 --> 00:18:45.089 see it. But the ultimate framework for explaining 00:18:45.089 --> 00:18:48.329 anything and everything in his system is the 00:18:48.329 --> 00:18:51.089 four causes. The four asia. The four fundamental 00:18:51.089 --> 00:18:53.029 explanations for why something is the way it 00:18:53.029 --> 00:18:55.690 is. If you want a complete explanation, you have 00:18:55.690 --> 00:18:57.769 to answer all four. Okay, let's list them. One. 00:18:58.299 --> 00:19:00.900 The material cause. What is it made of? For a 00:19:00.900 --> 00:19:05.099 bronze statue, it's the bronze. Two, the formal 00:19:05.099 --> 00:19:07.599 cause. What is its former design? The blueprint 00:19:07.599 --> 00:19:10.440 of the statue. Three. The efficient cause. Who 00:19:10.440 --> 00:19:14.200 or what made it? The sculptor. And four, and 00:19:14.200 --> 00:19:16.140 this is the most important for Aristotle, the 00:19:16.140 --> 00:19:18.759 final cause, the telos. What is its purpose? 00:19:18.880 --> 00:19:21.920 Why was it made? To honor a hero. To be beautiful. 00:19:22.359 --> 00:19:24.380 This framework is just everywhere in his thought. 00:19:24.480 --> 00:19:27.160 It applies to everything from a statue to a living 00:19:27.160 --> 00:19:29.079 creature. And it leads directly into his empirical 00:19:29.079 --> 00:19:31.759 work. He was a true pioneer in geology, for example. 00:19:31.960 --> 00:19:34.240 He recognized that the Earth changes on a scale 00:19:34.240 --> 00:19:37.200 far beyond a human lifetime. What kind of evidence 00:19:37.200 --> 00:19:39.619 did he use for that? He pointed to things like 00:19:39.619 --> 00:19:43.140 lakes that had dried up over generations or deserts 00:19:43.140 --> 00:19:45.500 that were being watered by shifting rivers. He 00:19:45.500 --> 00:19:48.180 even noted the upheaval of islands before a volcanic 00:19:48.180 --> 00:19:50.940 eruption. And he made this incredibly sharp observation 00:19:50.940 --> 00:19:53.740 about desalination, that evaporated seawater 00:19:53.740 --> 00:19:56.819 becomes freshwater. He understood the basics 00:19:56.819 --> 00:19:59.319 of the hydrologic cycle. But his real legacy 00:19:59.319 --> 00:20:02.279 as a scientist is in biology. I mean, he's called 00:20:02.279 --> 00:20:04.700 the father of zoology, the father of embryology. 00:20:05.079 --> 00:20:07.339 He was the first person to study biology systematically. 00:20:08.339 --> 00:20:11.220 classifying, observing, dissecting. A lot of 00:20:11.220 --> 00:20:13.799 his best work came from his time on Lesbos, where 00:20:13.799 --> 00:20:15.859 he was just immersed in studying marine life 00:20:15.859 --> 00:20:18.079 with the Euphrastis. His zoological writings 00:20:18.079 --> 00:20:20.440 are just packed with incredible detail. Detail 00:20:20.440 --> 00:20:22.299 that was so good, it was sometimes disbelieved 00:20:22.299 --> 00:20:25.140 for centuries. Absolutely. He accurately described 00:20:25.140 --> 00:20:27.900 the four -chambered stomachs of ruminants. He 00:20:27.900 --> 00:20:30.700 detailed the ova -viparous development of the 00:20:30.700 --> 00:20:32.559 hound shark, where the eggs hatch inside the 00:20:32.559 --> 00:20:34.950 mother. That's a very sophisticated observation 00:20:34.950 --> 00:20:37.089 for the time. But the best story is the octopus. 00:20:37.490 --> 00:20:40.509 The octopus arm, yes. He gave this perfectly 00:20:40.509 --> 00:20:43.950 accurate description of the hecticodal arm, which 00:20:43.950 --> 00:20:46.369 is a specialized arm the male octopus uses to 00:20:46.369 --> 00:20:49.789 transfer sperm. And for centuries, people thought 00:20:49.789 --> 00:20:52.069 he was just making it up. It sounded too weird. 00:20:52.309 --> 00:20:54.890 Until the 19th century, when biologists confirmed 00:20:54.890 --> 00:20:57.250 he was exactly right. It's the perfect example. 00:20:58.160 --> 00:21:00.319 His observations were sometimes too advanced 00:21:00.319 --> 00:21:02.880 for his time. He was seeing things that theory 00:21:02.880 --> 00:21:05.200 couldn't yet explain. And he wasn't just a passive 00:21:05.200 --> 00:21:07.740 observer. He did investigations. He wasn't doing 00:21:07.740 --> 00:21:10.359 controlled experiments in the modern sense, but 00:21:10.359 --> 00:21:12.819 he was definitely investigating. He famously 00:21:12.819 --> 00:21:15.480 describes opening a fertilized hen's egg at different 00:21:15.480 --> 00:21:18.359 stages to watch the embryo's heart start beating. 00:21:18.750 --> 00:21:21.269 His method was always to gather massive amounts 00:21:21.269 --> 00:21:24.049 of data and then infer general principles from 00:21:24.049 --> 00:21:26.130 it. Which is the scientific method in a nutshell. 00:21:26.369 --> 00:21:29.509 It is. And he used that data to create his great 00:21:29.509 --> 00:21:32.049 classification system, the Scala Naturae. The 00:21:32.049 --> 00:21:34.690 scale of nature. This is his hierarchy of life, 00:21:34.809 --> 00:21:38.349 right? Yes, he arranged about 500 species on 00:21:38.349 --> 00:21:40.970 this graded scale, from plants at the bottom 00:21:40.970 --> 00:21:42.829 up through various animals to man at the very 00:21:42.829 --> 00:21:46.029 top. He made big divisions, like animals with 00:21:46.029 --> 00:21:48.069 blood for vertebrates and animals without blood 00:21:48.069 --> 00:21:50.309 for invertebrates. But what makes him such a 00:21:50.309 --> 00:21:52.730 good scientist is that he wasn't a dogmatist 00:21:52.730 --> 00:21:56.589 about his own system. That's the key. He meticulously 00:21:56.589 --> 00:21:59.200 recorded the exceptions. the things that didn't 00:21:59.200 --> 00:22:02.279 neatly fit. For example, he noted that some sharks 00:22:02.279 --> 00:22:04.420 have a kind of placenta which seemed to violate 00:22:04.420 --> 00:22:06.940 his neat categories, but he wrote it down anyway 00:22:06.940 --> 00:22:08.920 because that's what he observed. The data always 00:22:08.920 --> 00:22:11.579 came first. So from the outer world of animals, 00:22:11.680 --> 00:22:14.720 he moves to the inner world of the mind, to psychology 00:22:14.720 --> 00:22:18.059 and the soul. Yes, in his book on the soul. And 00:22:18.059 --> 00:22:20.720 again, he uses his hylomorphism. The soul isn't 00:22:20.720 --> 00:22:23.359 some ghost living inside the body. It's the form 00:22:23.359 --> 00:22:25.240 of a living being. It's the principle of life 00:22:25.240 --> 00:22:27.359 that makes the body actually alive and able to 00:22:27.359 --> 00:22:30.420 move. And he proposed three types of soul. A 00:22:30.420 --> 00:22:33.859 nested hierarchy. First, the vegetative soul. 00:22:34.000 --> 00:22:37.079 This is about basic life functions. Growth, nutrition, 00:22:37.299 --> 00:22:39.859 plants have this. Then the sensitive soul, which 00:22:39.859 --> 00:22:42.039 adds sensation and movement. Animals have this. 00:22:42.259 --> 00:22:46.019 And finally, the human soul. The rational soul. 00:22:46.160 --> 00:22:48.539 This is unique to humans. It's what gives us 00:22:48.539 --> 00:22:52.500 intellect, nos, and reason. Logos. The ability 00:22:52.500 --> 00:22:54.839 to grasp the forms of things without their matter 00:22:54.839 --> 00:22:57.549 and to think abstractly. Where did he think this 00:22:57.549 --> 00:23:00.269 rational soul was located? This is one of his 00:23:00.269 --> 00:23:02.730 ideas that seems strange to us. He put it in 00:23:02.730 --> 00:23:05.609 the heart. He saw the heart as the central vital 00:23:05.609 --> 00:23:08.049 organ, the source of the body's heat and life. 00:23:09.230 --> 00:23:11.890 Sensation happened in the sense organs, but he 00:23:11.890 --> 00:23:14.809 believed thought was centered in the heart. He 00:23:14.809 --> 00:23:17.190 also had some profound insights into how thought 00:23:17.190 --> 00:23:20.259 actually works, especially memory. His theory 00:23:20.259 --> 00:23:22.240 of memory is incredibly modern. He said memory 00:23:22.240 --> 00:23:24.440 is holding on to a mental image, a phantasm, 00:23:24.559 --> 00:23:26.880 and recognizing it as something from the past. 00:23:27.259 --> 00:23:29.980 But recollection, pulling up a memory, isn't 00:23:29.980 --> 00:23:32.259 random. It works by the laws of association. 00:23:33.000 --> 00:23:35.440 Similarity, contrast, and contiguity. Exactly. 00:23:35.559 --> 00:23:37.279 You think of a friend, and that reminds you of 00:23:37.279 --> 00:23:38.920 another friend who looks similar. You think of 00:23:38.920 --> 00:23:40.660 hot, it makes you think of cold. You think of 00:23:40.660 --> 00:23:42.599 a place, and that reminds you of what happened 00:23:42.599 --> 00:23:45.880 there. He understood that our thoughts are linked 00:23:45.880 --> 00:23:48.079 in a chain. That's foundational to psychology. 00:23:48.640 --> 00:23:52.220 And he even had a theory of dreams that was surprisingly 00:23:52.220 --> 00:23:54.920 scientific for his time. He totally stripped 00:23:54.920 --> 00:23:57.660 them of any divine meaning. He rejected the idea 00:23:57.660 --> 00:23:59.619 that they predict the future. So what are they? 00:23:59.700 --> 00:24:03.240 He argued that during sleep, our senses are quiet, 00:24:03.380 --> 00:24:05.799 but the leftover impressions from the day are 00:24:05.799 --> 00:24:08.400 still lingering in our minds. And because there 00:24:08.400 --> 00:24:11.039 are no new distractions, we notice these faint 00:24:11.039 --> 00:24:14.339 echoes. And that's what dreams are. If one happens 00:24:14.339 --> 00:24:17.220 to match a future event, he said, it's just a 00:24:17.220 --> 00:24:19.930 coincidence. So we have the rules for argument, 00:24:20.130 --> 00:24:22.930 for existence, and for the entire physical world. 00:24:23.450 --> 00:24:26.089 Now we move to the big practical question. How 00:24:26.089 --> 00:24:28.190 should we live? This is practical philosophy. 00:24:28.369 --> 00:24:30.769 And for Aristotle, ethics is a practical science. 00:24:31.069 --> 00:24:33.109 The point isn't just to know what is good. The 00:24:33.109 --> 00:24:35.509 point is to become good and to do good. And it 00:24:35.509 --> 00:24:37.670 all starts with his concept of a proper function, 00:24:37.890 --> 00:24:40.710 an ergon. That's the core of his Nicomachean 00:24:40.710 --> 00:24:43.460 ethics. The function of an eye is to see. The 00:24:43.460 --> 00:24:46.140 function of a flute is to be played well. So 00:24:46.140 --> 00:24:48.440 what is the unique function of a human being? 00:24:48.599 --> 00:24:51.160 The activity of the soul in accordance with reason. 00:24:52.119 --> 00:24:55.279 So human excellence, human flourishing, is achieved 00:24:55.279 --> 00:24:57.980 by using our reason in the best possible way. 00:24:58.140 --> 00:25:00.480 Which leads to the ultimate goal of all human 00:25:00.480 --> 00:25:03.579 action, eudaimonia. We translate it as happiness, 00:25:03.660 --> 00:25:06.200 but that doesn't quite capture it. No, happiness 00:25:06.200 --> 00:25:08.940 makes it sound like a fleeting emotion. Eudaimonia 00:25:08.940 --> 00:25:11.240 is more like flourishing or living well and doing 00:25:11.240 --> 00:25:13.990 well. It's an objective state you achieve over 00:25:13.990 --> 00:25:16.529 a whole lifetime. And to get there, you need 00:25:16.529 --> 00:25:19.349 good character or moral virtue. And this is where 00:25:19.349 --> 00:25:22.349 we get his most famous ethical idea, the virtuous 00:25:22.349 --> 00:25:25.930 mean, the golden mean. Yes. Virtue is not an 00:25:25.930 --> 00:25:28.609 extreme. It's a perfect balance between two voices, 00:25:28.849 --> 00:25:32.289 a vice of excess and a vice of deficiency. And 00:25:32.289 --> 00:25:34.150 you find this mean through practice, through 00:25:34.150 --> 00:25:36.730 habit. Let's use the classic example of courage. 00:25:36.950 --> 00:25:38.650 Okay, courage is the virtuous mean. What's the 00:25:38.650 --> 00:25:41.589 deficiency? Cowardice? Too little bravery. What's 00:25:41.589 --> 00:25:44.289 the excess? Rashness. Too much bravery to the 00:25:44.289 --> 00:25:47.150 point of being reckless. Exactly. Or think about 00:25:47.150 --> 00:25:49.890 generosity. The deficiency is stinginess. The 00:25:49.890 --> 00:25:53.150 excess is being wasteful. The virtue is finding 00:25:53.150 --> 00:25:55.490 that sweet spot in the middle. It's about feeling 00:25:55.490 --> 00:25:57.730 the right way at the right time for the right 00:25:57.730 --> 00:26:00.369 reason. And that takes practical wisdom. So being 00:26:00.369 --> 00:26:04.309 a good person isn't about memorizing rules. It's 00:26:04.309 --> 00:26:06.809 about developing a good character, like an athlete 00:26:06.809 --> 00:26:09.450 training their body. It's a disposition, a state 00:26:09.450 --> 00:26:11.730 of character that you build through constant 00:26:11.730 --> 00:26:14.759 practice and making good choices. And that individual 00:26:14.759 --> 00:26:17.539 ethical project can't happen in a vacuum. It 00:26:17.539 --> 00:26:19.980 leads directly to his politics. It has to, because 00:26:19.980 --> 00:26:22.160 for Aristotle, you can't live a good life by 00:26:22.160 --> 00:26:24.759 yourself. He saw the city, the polis, as a natural 00:26:24.759 --> 00:26:27.299 community. He had this organic view where the 00:26:27.299 --> 00:26:29.920 city is more fundamental than the family, and 00:26:29.920 --> 00:26:31.839 the family is more fundamental than the individual. 00:26:32.140 --> 00:26:35.299 For the whole must of necessity be prior to the 00:26:35.299 --> 00:26:37.640 part. Right, which leads to his most famous political 00:26:37.640 --> 00:26:41.079 statement. Man is by nature a political animal. 00:26:41.259 --> 00:26:43.180 What does he mean by that? We're not just social 00:26:43.180 --> 00:26:46.500 like ants or bees. No, it's our rationality, 00:26:46.500 --> 00:26:49.559 our logos. We have language, which allows us 00:26:49.559 --> 00:26:53.000 to discuss ideas like justice and goodness. And 00:26:53.000 --> 00:26:55.339 the polis is the place where that rational capacity 00:26:55.339 --> 00:26:58.880 can be fully expressed. Living in a state governed 00:26:58.880 --> 00:27:01.619 by shared laws and discourse is what makes us 00:27:01.619 --> 00:27:03.819 fully human. So what's the purpose of the city? 00:27:03.920 --> 00:27:06.519 Is it just for defense or for trade? This is 00:27:06.519 --> 00:27:09.329 his most profound political idea. The purpose 00:27:09.329 --> 00:27:11.910 of the state is not just survival or economic 00:27:11.910 --> 00:27:15.170 stability. The telos of the city is for the sake 00:27:15.170 --> 00:27:18.029 of noble actions. The state exists to make it 00:27:18.029 --> 00:27:20.789 possible for citizens to achieve eudaimonia, 00:27:20.950 --> 00:27:23.569 to live a virtuous life. That's a much higher 00:27:23.569 --> 00:27:25.890 bar than most modern political theories set. 00:27:26.069 --> 00:27:28.049 Much higher. It's not just about protecting us 00:27:28.049 --> 00:27:30.069 from harm. It's about helping us flourish. And 00:27:30.069 --> 00:27:32.309 like with ethics, he was wary of extremes in 00:27:32.309 --> 00:27:34.329 government. He didn't like pure democracy. He 00:27:34.329 --> 00:27:36.369 thought pure democracy could easily become mob 00:27:36.369 --> 00:27:39.000 rule. Just like pure oligarchy was just rule 00:27:39.000 --> 00:27:41.220 by the rich for the rich. He was searching for 00:27:41.220 --> 00:27:43.539 a stable system. And his solution was a mixed 00:27:43.539 --> 00:27:48.019 state. A mixed constitution, or politia. It tries 00:27:48.019 --> 00:27:50.079 to blend the best elements of different systems 00:27:50.079 --> 00:27:52.839 to balance them out. So you might take a feature 00:27:52.839 --> 00:27:55.599 from oligarchy, like electing the most qualified 00:27:55.599 --> 00:27:58.240 people to office, and blend it with a feature 00:27:58.240 --> 00:28:00.880 from democracy, like having no property requirement 00:28:00.880 --> 00:28:03.339 to be on the council. It's about mixing principles 00:28:03.339 --> 00:28:06.190 to serve the common good. He also laid some of 00:28:06.190 --> 00:28:08.450 the groundwork for economics. He had a lot to 00:28:08.450 --> 00:28:10.650 say about private property. He did, and he was 00:28:10.650 --> 00:28:13.470 a big defender of it. Unlike Plato, who wanted 00:28:13.470 --> 00:28:16.410 a guardian class with no private property, Aristotle 00:28:16.410 --> 00:28:18.950 made a very practical argument. Which was? He 00:28:18.950 --> 00:28:20.970 said the problems we blame on property, like 00:28:20.970 --> 00:28:23.430 greed, don't come from property itself. They 00:28:23.430 --> 00:28:26.630 come from human nature. And he argued that people 00:28:26.630 --> 00:28:28.430 take better care of what they own personally, 00:28:28.589 --> 00:28:31.009 and that ownership actually allows for virtues 00:28:31.009 --> 00:28:34.039 like generosity. You can't be generous with something 00:28:34.039 --> 00:28:36.319 that isn't yours to give. He also had a theory 00:28:36.319 --> 00:28:38.759 about where money came from. He saw it as a tool 00:28:38.759 --> 00:28:40.940 that arose out of pure convenience for trade. 00:28:41.779 --> 00:28:44.400 When people needed to import and export things, 00:28:44.759 --> 00:28:47.599 barter became too clumsy, so they agreed on a 00:28:47.599 --> 00:28:50.420 common medium, like iron or silver, that was 00:28:50.420 --> 00:28:52.880 easy to measure and carry. But he had a really 00:28:52.880 --> 00:28:55.380 low opinion of making money just for the sake 00:28:55.380 --> 00:28:58.480 of making money. A very low opinion. He was deeply 00:28:58.480 --> 00:29:01.420 critical of retail and profit -seeking. He saw 00:29:01.420 --> 00:29:04.259 it as unnatural. And he especially condemned 00:29:04.259 --> 00:29:07.240 charging interest or usury. Why was that so bad 00:29:07.240 --> 00:29:09.599 in his view? Because it was making money from 00:29:09.599 --> 00:29:13.119 money itself. He saw money as barren. Its purpose 00:29:13.119 --> 00:29:15.720 was to facilitate exchange, not to breed more 00:29:15.720 --> 00:29:18.799 money. This view had a massive influence on religious 00:29:18.799 --> 00:29:21.259 prohibitions against usury for centuries. And 00:29:21.259 --> 00:29:23.539 yet, for all his criticism, he understood the 00:29:23.539 --> 00:29:25.680 functions of money incredibly well. He really 00:29:25.680 --> 00:29:27.859 did. He gave this brilliant summary. He said 00:29:27.859 --> 00:29:29.940 it serves as a universal standard of measurement, 00:29:30.039 --> 00:29:32.440 making different things commensurable. And he 00:29:32.440 --> 00:29:34.400 said it acts as a sort of security for future 00:29:34.400 --> 00:29:37.259 exchange, a very sophisticated analysis. The 00:29:37.259 --> 00:29:39.660 breadth is just staggering. From politics and 00:29:39.660 --> 00:29:42.019 economics, he then moves on to the arts of persuasion 00:29:42.019 --> 00:29:44.650 and poetry. His rhetoric is still the foundational 00:29:44.650 --> 00:29:47.769 text. It's a systematic guide to persuasion that 00:29:47.769 --> 00:29:50.009 is still taught everywhere. He says there are 00:29:50.009 --> 00:29:52.309 three fundamental appeals a speaker must use. 00:29:52.549 --> 00:29:55.509 Ethos, pathos, and logos. Ethos, the appeal to 00:29:55.509 --> 00:29:58.529 your own character and credibility. Pathos, the 00:29:58.529 --> 00:30:01.109 appeal to the audience's emotions. And logos, 00:30:01.410 --> 00:30:04.099 the appeal to logical reasoning. We use those 00:30:04.099 --> 00:30:06.059 terms all the time when we talk about speeches 00:30:06.059 --> 00:30:08.359 or ads. We're speaking Aristotle's language. 00:30:08.599 --> 00:30:10.799 We are. He also broke down the different kinds 00:30:10.799 --> 00:30:13.900 of speeches, ceremonial, legal, political, and 00:30:13.900 --> 00:30:15.400 the different kinds of proofs you could use. 00:30:15.500 --> 00:30:18.160 It was a complete system. And then in his poetics, 00:30:18.240 --> 00:30:20.519 he does the same thing for drama. It all starts 00:30:20.519 --> 00:30:24.500 with one concept, mimesis. Mimesis or imitation. 00:30:25.079 --> 00:30:29.339 He saw all art, poetry, tragedy, comedy, music 00:30:29.339 --> 00:30:32.259 as fundamentally an imitation of life and action. 00:30:32.559 --> 00:30:34.779 He thought it was a natural human instinct to 00:30:34.779 --> 00:30:37.799 imitate and to enjoy imitations. And his analysis 00:30:37.799 --> 00:30:40.539 of tragedy became the blueprint for Western drama. 00:30:40.779 --> 00:30:43.119 He defined tragedy as an imitation of a serious 00:30:43.119 --> 00:30:45.680 action that arouses pity and fear in the audience 00:30:45.680 --> 00:30:48.839 in order to achieve catharsis. A purging or cleansing 00:30:48.839 --> 00:30:52.099 of those emotions. Exactly. By watching a good 00:30:52.099 --> 00:30:55.680 person suffer due to some fatal flaw, we experience 00:30:55.680 --> 00:30:58.160 those powerful emotions in a safe, controlled 00:30:58.160 --> 00:31:01.869 way and come out cleansed. He held up Sophocles' 00:31:02.049 --> 00:31:04.309 Oedipus Tyrannus as the perfect example of tragedy. 00:31:04.589 --> 00:31:06.650 And in his typical fashion, he even argued that 00:31:06.650 --> 00:31:09.430 tragedy was a superior art form to epic poetry. 00:31:09.789 --> 00:31:12.130 He did. He said it has everything an epic has, 00:31:12.269 --> 00:31:14.849 plus it has music and spectacle, it's more unified, 00:31:15.109 --> 00:31:17.869 and it achieves its goal of catharsis in a much 00:31:17.869 --> 00:31:20.190 more direct and concentrated way. It's just mind 00:31:20.190 --> 00:31:21.890 -boggling that a single person could lay the 00:31:21.890 --> 00:31:24.769 foundations for so many fields. So let's wrap 00:31:24.769 --> 00:31:27.440 up by looking at his legacy. How was all this 00:31:27.440 --> 00:31:29.920 received and where do we still feel his influence? 00:31:30.279 --> 00:31:32.119 Well, the titles he's been given tell the story. 00:31:32.200 --> 00:31:35.380 The first scientist, the father of logic, biology, 00:31:35.740 --> 00:31:38.660 political science, zoology, rhetoric. The list 00:31:38.660 --> 00:31:40.960 is just enormous. And his influence wasn't just 00:31:40.960 --> 00:31:43.700 in Europe. It was global, shaping three major 00:31:43.700 --> 00:31:46.059 intellectual traditions at once during the medieval 00:31:46.059 --> 00:31:49.140 period. Absolutely. In the Islamic world, he 00:31:49.140 --> 00:31:51.829 was known as the first teacher. During the European 00:31:51.829 --> 00:31:54.950 Dark Ages, it was Islamic scholars who preserved, 00:31:55.289 --> 00:31:58.349 translated, and studied his work. Thinkers like 00:31:58.349 --> 00:32:01.529 Avicenna and Averroes used his logic to build 00:32:01.529 --> 00:32:03.529 their own systems of philosophy and theology. 00:32:03.869 --> 00:32:05.990 And it was the same in medieval Judaism. Yes. 00:32:06.029 --> 00:32:09.410 The great scholar Imanides based his work on 00:32:09.410 --> 00:32:12.630 Aristotelian logic. He called Aristotle the... 00:32:12.990 --> 00:32:15.950 chief of the philosophers, and said his intellect 00:32:15.950 --> 00:32:18.089 represented the absolute peak of what a human 00:32:18.089 --> 00:32:20.869 mind could achieve. Then, when his works were 00:32:20.869 --> 00:32:23.170 reintroduced to Western Europe, he became the 00:32:23.170 --> 00:32:25.609 central figure of scholasticism. He was just 00:32:25.609 --> 00:32:28.309 called the philosopher, as in the only one you 00:32:28.309 --> 00:32:30.670 needed to reference. Thinkers like Thomas Aquinas 00:32:30.670 --> 00:32:32.990 built their entire theological systems on his 00:32:32.990 --> 00:32:35.710 philosophical foundation. The poet Dante called 00:32:35.710 --> 00:32:37.710 him the master of those who know. For over a 00:32:37.710 --> 00:32:40.130 thousand years, he was the unquestioned authority. 00:32:40.670 --> 00:32:43.250 But science moves on. The very spirit of inquiry 00:32:43.250 --> 00:32:45.329 that he championed meant that his own conclusions 00:32:45.329 --> 00:32:47.470 would eventually have to be challenged. And the 00:32:47.470 --> 00:32:51.190 critique started pretty early. In late antiquity, 00:32:51.190 --> 00:32:53.869 a scholar named John Philipponus questioned his 00:32:53.869 --> 00:32:56.829 physics, especially the idea that a vacuum was 00:32:56.829 --> 00:32:59.589 impossible. He introduced the theory of impetus, 00:32:59.769 --> 00:33:02.670 the idea that a force is imparted into a thrown 00:33:02.670 --> 00:33:05.369 object. Which is a much better explanation for 00:33:05.369 --> 00:33:08.170 why a spear keeps flying. A much better one. 00:33:08.519 --> 00:33:11.000 Then, during the Renaissance, the new scientific 00:33:11.000 --> 00:33:14.319 method began to systematically replace Aristotle's 00:33:14.319 --> 00:33:16.539 models. You have people like William Harvey. 00:33:16.740 --> 00:33:19.000 Right. William Harvey demonstrated that blood 00:33:19.000 --> 00:33:21.700 circulates in a closed system with the heart 00:33:21.700 --> 00:33:24.500 acting as a pump. This completely contradicted 00:33:24.500 --> 00:33:26.460 Aristotle's view of the heart as the seed of 00:33:26.460 --> 00:33:28.759 the soul where blood was made and consumed. And, 00:33:28.799 --> 00:33:32.400 of course, Galileo and the falling bodies. Galileo 00:33:32.400 --> 00:33:34.440 challenged the idea that heavier objects fall 00:33:34.440 --> 00:33:37.180 faster. But as we said, even there, Aristotle's 00:33:37.180 --> 00:33:38.779 model was a pretty good description of what you 00:33:38.779 --> 00:33:40.700 actually see in the real world with air resistance. 00:33:41.079 --> 00:33:43.119 What about his logic? That held on for a very 00:33:43.119 --> 00:33:45.859 long time. Until the 19th century, with George 00:33:45.859 --> 00:33:48.869 Boole. Boole had immense respect for Aristotle's 00:33:48.869 --> 00:33:51.970 logic, but he wanted to go under, over, and beyond 00:33:51.970 --> 00:33:55.250 it by creating a mathematical, symbolic logic. 00:33:55.609 --> 00:33:58.069 That was the next great leap. But in biology, 00:33:58.410 --> 00:34:01.509 even today, his reputation is incredible. Charles 00:34:01.509 --> 00:34:03.849 Darwin paid him the ultimate compliment. He did. 00:34:03.970 --> 00:34:06.470 Darwin said that the great biologists Linnaeus 00:34:06.470 --> 00:34:09.369 and Cuvier were mere schoolboys to old Aristotle. 00:34:09.849 --> 00:34:12.010 That's just a stunning endorsement from the founder 00:34:12.010 --> 00:34:13.889 of modern biology. And you can still see his 00:34:13.889 --> 00:34:17.269 frameworks in use. Absolutely. The modern study 00:34:17.269 --> 00:34:19.750 of animal behavior uses Nico Tinbergen's four 00:34:19.750 --> 00:34:22.469 questions about function, evolution, mechanism, 00:34:22.670 --> 00:34:25.590 and development. That framework is based directly 00:34:25.590 --> 00:34:28.610 on Aristotle's four causes. The structure of 00:34:28.610 --> 00:34:30.489 his thought is still with us. Which brings us 00:34:30.489 --> 00:34:32.150 back to that painting, The School of Athens. 00:34:32.309 --> 00:34:34.409 It's such a perfect visual summary. It really 00:34:34.409 --> 00:34:37.150 is. Plato, the idealist, pointing to the heavens. 00:34:37.329 --> 00:34:40.250 And Aristotle, the empiricist, hand held down, 00:34:40.329 --> 00:34:42.710 gesturing to the earth, acknowledging that knowledge 00:34:42.710 --> 00:34:45.360 begins here. with a systematic observation of 00:34:45.360 --> 00:34:47.480 the world in front of us. So after all of this, 00:34:47.519 --> 00:34:49.179 what does it really mean for you, the listener, 00:34:49.219 --> 00:34:51.960 today? I think Aristotle's real achievement isn't 00:34:51.960 --> 00:34:54.840 any single discovery. It's the conceptual architecture 00:34:54.840 --> 00:34:58.460 he built, the logic, the framework of causality, 00:34:58.519 --> 00:35:01.400 the categories. These were the tools that allowed 00:35:01.400 --> 00:35:04.019 science and philosophy to develop for the next 00:35:04.019 --> 00:35:07.420 2 ,000 years. His influence is this invisible 00:35:07.420 --> 00:35:09.440 structure under almost all of Western thought. 00:35:09.599 --> 00:35:11.719 So when you make an argument with a premise and 00:35:11.719 --> 00:35:15.179 a conclusion, or you analyze a speech using ethos, 00:35:15.179 --> 00:35:18.059 pathos, and logos, or you ask what the ultimate 00:35:18.059 --> 00:35:21.300 purpose of something is, you're using an Aristotelian 00:35:21.300 --> 00:35:23.599 framework. His legacy isn't really about his 00:35:23.599 --> 00:35:26.139 answers, many of which have been corrected. It's 00:35:26.139 --> 00:35:28.679 about the powerful, systematic questions he taught 00:35:28.679 --> 00:35:31.179 us all how to ask. He gave us the toolbox. He 00:35:31.179 --> 00:35:32.960 gave us the toolbox, and he linked it all to 00:35:32.960 --> 00:35:35.860 this idea of eudaimonia, a flourishing life, 00:35:36.000 --> 00:35:38.280 which could only be achieved in a state that 00:35:38.280 --> 00:35:40.199 aimed for something higher than just survival. 00:35:40.829 --> 00:35:43.570 And that leaves us with a final provocative thought 00:35:43.570 --> 00:35:46.150 for you to consider. Aristotle believed that 00:35:46.150 --> 00:35:48.510 the city, the polis, exists not for mere survival, 00:35:48.730 --> 00:35:51.849 but for the sake of noble actions. So if you 00:35:51.849 --> 00:35:55.670 were to apply that idea, his concept of the final 00:35:55.670 --> 00:35:58.590 cause, to our modern political and economic systems, 00:35:58.809 --> 00:36:01.150 what would their telos be? What is their true 00:36:01.150 --> 00:36:03.610 ultimate purpose? And more importantly, how close 00:36:03.610 --> 00:36:05.710 are they to achieving it? That is a deep dive 00:36:05.710 --> 00:36:07.849 for another time. Thanks for listening. We'll 00:36:07.849 --> 00:36:09.389 see you next time on The Deep Dive.