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Aristotle: The World’s Greatest Philosopher?

Alex O'Connor | June 26, 2026



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– VIDEO NOTES

John Sellars is a Reader in philosophy at Royal Holloway, University of London, a visiting Research Fellow at King’s College London and a Member of Wolfson College, Oxford. His books include Lessons in Stoicism, The Fourfold Remedy, Aristotle and his work has been translated into over a dozen languages.

– LINKS

Get John Sellars’ books: https://amzn.to/4rqOnSS

– TIMESTAMPS

0:00 – What’s So Great About Aristotle?
3:06 – Actuality and Potentiality
12:59 – Forms: Aristotle vs Plato
20:02 – The Four Causes
25:16 – Evolution and Final Causation
29:40 – Did Aristotle Believe In God?
32:38 – The Unmoved Mover
38:58 – The Soul (Is Not What You Might Think)
48:51 – How Aristotle Invented Formal Logic
55:54 – The Nicomachean Ethics
1:15:56 – Ethics as Descriptive
1:21:04 – Where To Start With Aristotle

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Written by Alex O'Connor

Comments

This post currently has 26 comments.

  1. @kahwigulum

    June 26, 2026 at 3:14 am

    It's just like a philosopher to make things more complicated than they have to be, or are, and to assume his presuppositions are the only possible way something could exist.

  2. @ket1991100

    June 26, 2026 at 3:14 am

    A table can be a chair if you sit on it. A chair is just something you sit on. The purpose of an object is what it is used for at the moment. The chairs they are sitting on could be a table if they set other things on them and designated no one should sit on it. Can a tree stump be considered a chair? The shape of a thing does not define it but its purpose. We are biological, chemical driven clumps of mass with an internal and limited power supply based off the other biological, chemically driven clumps of mass we have consumed. Our evolved ways of motion have limitations that can fatigue and by sitting on something, we relieve the stresses of gravity from that system to allow it to regenerate. The chair does not exist but sitting does. Anything can be a hammer.

  3. @johnpoole3871

    June 26, 2026 at 3:14 am

    I remember at one point in college I had three classes in very different disciplines, none of them philosophy, where we happened to be studying what Aristotle had to say about that topic at the same time. I found that a really fantastic coincidence.

  4. @edgarmorales4476

    June 26, 2026 at 3:14 am

    Scientists and religious teachers desperately seek the truth of life, but they look in the wrong place. Scientists and religious teachers study the physical body and the material world to find answers. But these things are only mental illusions. By hiding behind the physical body and the material world, scientists and religious teachers make the truth of life invisible to themselves.

  5. @ArmchairRizzard

    June 26, 2026 at 3:14 am

    Oh good, our guest using the phrase, “reductive materialist“ when what he really means is “I don’t understand how life arose from dead matter, so it must not be the explanation. I’ll believe in fundamental consciousness or spirits or whatever.“

  6. @supernaturalabilities

    June 26, 2026 at 3:14 am

    Aristotle argued that all physical, tangible things in the earthly world are composed of different mixtures of earth, air, fire, and water (the classical elements). He also famously introduced aether, or quintessence (the "Fifth Element"), as an incorruptible, eternal essence that distinguishes the heavenly realm from earthly matter.

    The classical elements are not physical substances in the modern scientific sense. Rather, they can be understood as four fundamental aspects of consciousness—not human consciousness, but consciousness in the panpsychist sense.

  7. @iamyourboredom6678

    June 26, 2026 at 3:14 am

    As a law student, we study Artistotle's works about Nichomachean ethics. And honestly? You really don't appreciate why Aristotle is so well regarded and widely celebrated across time and history until you read it, understand it, and debate it amongst yourselves.

  8. @AaTagPag

    June 26, 2026 at 3:14 am

    You could argue that an acorn IS an oak tree, just at a different stage of life. To say that an acorn is a nut or a seed is like saying that a puppy isn't a dog, and likewise that an egg isn't a chicken. In fact, that seems to be the logic that anti-abortionists follow. An embryo or a fetus is a human, just in a different stage of life.

  9. @supernaturalabilities

    June 26, 2026 at 3:14 am

    Everything changes within the temporal realm. Yet everything (the non-physical essence) eternally abides in the eternal realm. The physical universe continuously emerges from the eternal non-physical essence through a natural process that has neither a beginning nor an end. The gods of the Abrahamic religions are simply men and did not create this universe.

  10. @ldlework

    June 26, 2026 at 3:14 am

    Alex, please consider that Form and Function are not just related, they are symmetry, nearly synonymous. The shape of a thing is what it does. If a thing is doing something, it must have a given shape.

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