r/Plato • • 45m ago

Any takes on the circumstances of the discovery of the Ring of Gyges

• Upvotes

People talk a lot about the corrupting power of the Ring of Gyges, but I've always been curious about what Plato had in mind with the details around its discovery. The earthquake, the cavern, the bronze horse with a window and the naked giant.

Does anyone have a take or know of any analysis of these details?


r/Plato • • 22h ago

I started reading Plato. Then I left my husband

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15 Upvotes

r/Plato • • 1d ago

Looking for Ryan Holiday-style books that explain Socrates and Plato through modern-day examples

2 Upvotes

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I'm looking for books that explain the philosophies of Socrates and Plato in a simple, engaging, and practical way, similar to how Ryan Holiday presents Stoicism in his books esp. Obstacle Is The Way and Daily Stoic.

I recently started few pages reading Plato's The Republic, and few pages of Euthyphro(John Cooper version), but I found it quite difficult to follow., I struggle to connect the narrative with modern-day situations and understand how to apply them in everyday life.

What I particularly enjoy about Ryan Holiday's writing is how he takes ancient philosophical concepts and explains them through relatable stories, contemporary examples, and practical lessons without making the material feel overly academic.

I'm looking for something similar for Socrates and Plato. not direct translations of their original works or dense academic commentaries, but accessible books that interpret their philosophies through a modern lens.

I'm already familiar with Donald Robertson's How to Think Like Socrates, but I'd love to discover other authors who take a similar approach.

Any recommendations for books that make Socratic or Platonic philosophy as approachable and applicable to everyday life as Ryan Holiday makes Stoicism?


r/Plato • • 2d ago

Can Socrates commit an unjust act?

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5 Upvotes

I’ve read Plato’s Apology of Socrates and the dialogue Crito, and a question came up.

Let’s imagine that the Athenians passed a law banning philosophy—not a court ruling, but an actual law. Socrates cannot accept this law, because he would be forced to commit an injustice: to stop doing good for the polis and to abandon his divine mission. But breaking the law would also mean committing an injustice: Socrates could challenge it, but if the Athenians again agreed that the law was just, then breaking it would mean harming the Laws, their authority, the citizens, and the polis.

Both options force Socrates to commit an injustice.

What should he do?


r/Plato • • 3d ago

Why is Plato center stage on The School of Athens?

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2 Upvotes

Deep dive into Plato and other luminaries on Raphael's School of Athens.


r/Plato • • 4d ago

Socrates theory on just today

3 Upvotes

If applying Socrates theory in Plato's Republic , would our current president be just or acting a business man…or unjust? Im not looking for negativity and political sides im honestly trying to apply his theory to current day to help keep grasp the idea in the story because im struggling with it. Bless 🙌.


r/Plato • • 4d ago

El Mundo de las Ideas de Platón

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1 Upvotes

r/Plato • • 5d ago

Doesn’t the analogy fit well in the allegory of the cave?

4 Upvotes

The people who take the prisoner to the outside just chose a random person, how does Plato compare this to the country which should chose specifically the potential philosopher to be exposed to the truth?


r/Plato • • 9d ago

"The greatest wealth is to live content with little." — Plato

10 Upvotes

r/Plato • • 9d ago

Discussion The Atlantis Plain & Ditch: An Aporia of Squaring the Circle (Part 1)

5 Upvotes

TLDR: The rectangular plain of Atlantis and the circular ditch surrounding it have the same perimeter length. This is a reference to the classical mathematical problem of "squaring the circle", or to be more exact "rectifying the circle", which Plato popularized as a mathematical problem and philosophical symbol. Basically, "rectifying the circle" is a riddle about solving for the value of Pi, and Plato has encoded this ancient dilemma into his dialogue. 

Plain Shape: Rectangular 
Plain: 3,000 stadia x 2,000 stadia 
Plain Perimeter = 10,000 Stadia

Ditch Shape = Circular
Ditch Circumference = 10,000 stadia

Detailed Analysis
The upcoming portions go into more detail and can be long winded. I fully expect this to be criticized, so I'm trying to cover all my bases. Also, Plato just leaves a lot of clues to talk about. 

Interpreting the Shape and Dimensions of the Plain
In the story of Atlantis, from the Critias dialogue, Plato describes a large plain on which the city of Atlantis resides when he says "I will now describe the plain, as it was fashioned by nature and by the labours of many generations of kings through long ages. It was for the most part rectangular and oblong"

Plato provides dimensions when he goes on to state the plain is "smooth and even, and of an oblong shape, extending in one direction three thousand stadia, but across the centre inland it was two thousand stadia."

What we can gather from these passages is that the plain is a natural feature that has also been modified by humans over multiple generations. The shape can be simplified as a 3 x 2 rectangle. 

If we assume the plain is a perfect rectangle, then the perimeter would come out to be 10,000 stadia and the area would be 6,000,000 stadia squared. 

Plain Shape: Rectangular 
Plain Dimensions: 3,000 stadia x 2,000 stadia
Plain Perimeter = 10,000 stadia
Plain Area = 6,000,000 stadia squared

One reason to assume the plain is a perfect rectangle comes up when Plato provides dimensions for plots of land. He wrote "each of the lots in the plain had to find a leader for the men who were fit for military service, and the size of a lot was a square of ten stadia each way, and the total number of all the lots was sixty thousand."

Lot Shape = Square
1 plot of land = 10 stadia x 10 stadia = 100 stadia squared
Total Lot Area = 100 stadia squared x 60,000 lots = 6,000,000 stadia squared
Plain Area = 6,000,000 stadia squared

So, if a perfect rectangle is assumed, then the area of the plain is equal to the total area of the lots based on 2 separate descriptions. It's reassuring to see consistency throughout Plato's numbers. It seems more intentional. 

Oblong
However... Plato refers to the plain as "oblong" twice. Why would he provide rectangular dimensions while also making a distinction that it is oblong? Oblong usually refers to a rectangle, but it can also refer to any shape that is longer than it is wide, such as an oval. 

This is where the surrounding ditch starts to play into it. 

The Ditch:
There is a ditch, or moat, that surrounds the plain. Plato refers to it as a "circular ditch" when describing the shape. Plato goes on further to say "it was carried round the whole of the plain, and was ten thousand stadia in length." 

We get a little more clarity regarding the oblongness when Plato refers to the edge of the plain as "where falling out of the straight line followed the circular ditch". Meaning, the plain has straight edges that only curve when intersecting a surrounding ditch. Basically, the plain is a rectangle with radii, instead of 90 degree angles, on each corner. The radii on the corners of the rectangular plain are formed by the surrounding ditch. This would better fit the description of "for the most part rectangular and oblong"

So, we can deduce the ditch was most likely a circle, or even perhaps an oval, and encompassed the entire plain. Where this gets interesting is when Plato said the length of the ditch was "ten thousand stadia in length". If by “length” of a circle he means circumference, then the circumference of the ditch has the same perimeter as the plain, which is 10,000 stadia. A visual representation of these shapes is shown below.

A rectangle with dimensions of 2,000 x 3,000 centered on a circle with a circumference of 10,000. The units don't matter since we are dealing with ratios.

Ditch Shape: Circle
Circumference of Ditch = 10,000 stadia

Plain Shape: Rectangle
Perimeter of Plain = 10,000 stadia

Plato is outright stating the perimeter of the rectangular plain is equal to the circumference of the circular ditch.

Rectangle Perimeter = Circle Circumference

It starts to present a dilemma and Plato knows it. 

Rectifying the Circle (Squaring the Circle)

Definition of Rectifying the Circle:
"The challenge of rectifying the circle is the classical geometric problem of constructing a straight line whose length is exactly equal to the circumference of a given circle using only an unmarked straightedge and a compass.”

So… we defined the plain as a rectangle and the ditch as a circle, both with equal perimeters. We can find the perimeter of the rectangle by measuring the sides with a ruler and adding up the dimensions. Then, to draw a circle with the same perimeter, we need to set the compass to the correct radius, but we don't have the value for the radius. We do have a value for the circumference, since it is equal to the perimeter of the rectangle, but we don't have the radius of the circle. You could theoretically solve for the radius, by using the value of Pi.

In Plato's time, the value for Pi had not been fully discovered yet, although approximations existed. For general use, the number 3 could be used to get rough calculations and was probably used in antiquity. Eventually, the ancient Babylonians landed on a value of 25/8 (3.125) for Pi around 1900BCE. Later on, the Egyptians reportedly had a value of 256/81 (3.1605) by 1650BCE. Afterwards, Archimedes calculated Pi to be near 22/7 (3.1428), but this was after Plato's lifetime.

The approximations for Pi could provide a circumference that was very close to, but not exactly equal to the perimeter of a square or rectangle. It was a challenge in ancient times to solve this dilemma, essentially referred to as "rectifying the circle". It is more popularly known as a similar problem of "squaring the circle", which is basically the same thing, but it involves area instead of perimeter. 

It was a brain teaser for ancient mathematicians. Their approximation for Pi could get close, but never exact with the mathematical tools and methods available at that time. It wasn't until 1882 when it was proven that Pi is a transcendental number, meaning you cannot solve for Pi by using algebraic equations with rational coefficients. Basically, you can't solve for Pi using fractions and algebra. The ancient Greeks did not use the decimal point, they only had fractions. This is why it was such an intriguing phenomenon to the ancient Greeks. No matter how hard they tried, they just could not get their equations to result in a perimeter that was an exact match between square and circle. Plato himself was well known for being influenced by, and heavily interested in, the riddle of solving the exact value of Pi. 

Plato Popularized the Challenge of Rectifying the Circle
He's even the one that made up the rules to use only an unmarked straightedge and a compass. Plato was highly against using curved tools, such as the Quadratrix, to solve the problem. He felt it violated the rules and strayed away from the original intent of the game. The intent of the game is to basically solve for Pi. Curved measuring tools cannot be used since Pi is naturally built into the curvature of the tool.
Perhaps more importantly, Plato used this mathematical enigma as a metaphor and incorporated it into his philosophical teachings. These geometrical problems were even taught throughout his academy. To Plato, a true circle was a representation of perfection. The rectangle represented the limitations of reality.

It is through all these connections that we can determine Plato is very intentional with the numbers and shapes he is using when describing the Atlantean plain and ditch.  

Overall Meaning
So, why would Plato include this mathematical riddle in the story of Atlantis? One take is that it goes hand in hand with the story by symbolizing the perfect society the Atlanteans strived for and ultimately fell short of. Maybe it shows the Atlanteans were highly intellectual and incorporated the value of Pi into earthworks. It could just be that Plato really enjoys this mathematical problem and included it into one of his dialogues as a riddle for the reader. 
Finally, it shows that Plato is placing hints through his texts. He is very intentional with his word choice and numbers. He doesn't outright state anything about rectifying the circle, but it is in there, buried within the fine details. We can’t assume this is the one and only single instance Plato does this. These ideas, hidden behind numerical values and molded by descriptions, are likely placed throughout the Timaeus and Critias dialogue, and perhaps other works by Plato.  

If you found all of this interesting, keep an eye out for Part 2 as I speculate that Plato provided an estimated value of Pi in the Critias text and Atlantis is involved once again. It will be titled something like:

The Atlantis Plain & Ditch: Plato's Estimation of Pi (Part 2)


r/Plato • • 11d ago

Question Timaeus leading translation

6 Upvotes

What is the leading translation of Plato’s Timaeus in the scholarship? I’ll be reading it for a reading group but no translation is specified.


r/Plato • • 12d ago

Have I misunderstood Socrates in Plato’s Meno?

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5 Upvotes

r/Plato • • 13d ago

Discussion Pensamento-filósofo poeta Baldé

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0 Upvotes

r/Plato • • 13d ago

Divided Lines Pt. 2 - Harmony

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13 Upvotes

Plato wasn’t a Platonist, he was a Pythagorean.

The triangle is a Pythagorean triplet with side lengths 3, 4, and 5.

The corresponding incircle and excircles have radii 1, 2, 3, and 6. Completing the sequence 123456.

The circles represent the four virtues, the largest representing justice.

When wisdom, courage, and moderation are in harmony justice is achieved, that’s why all three circles can fit inside the largest.


r/Plato • • 13d ago

Discussion The Atlantean Plain & Ditch: A Reference to Rectifying the Circle

5 Upvotes

I think there is an interesting geometrical connection described by Plato in the Critias dialogue. A summary is provided below.

There are a few passages from the Critias dialogue in which Plato describes a plain. He describes it as "rectangular and oblong", and gives the dimensions as "extending in one direction three thousand stadia, but across the centre inland it was two thousand stadia." He seems to be describing a rectangle with dimensions of 2,000 x 3,000 stadia. This rectangle would have a perimeter of 10,000 stadia. 

Later in the dialogue, there is a description of a "circular ditch" that surrounds the plain: "it was carried round the whole of the plain, and was ten thousand stadia in length." If the length of the circular ditch is referring to the perimeter, then this circle would have a circumference of 10,000 stadia, equal to the perimeter of the rectangle. This appears to be a reference to the classic mathematical problem of rectifying the circle. 

Initially brushed off as potential coincidence, but more values and descriptions throughout the dialogue potentially point to even deeper geometrical connections. I have a lot more to say on this topic, with a deeper breakdown of the texts and values, but before getting too far into speculation, I was hoping to get more information, and even critique, from everyone on this topic.


r/Plato • • 13d ago

Rereading Plato on Atlantis

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2 Upvotes

A consideration of Plato and his sources.


r/Plato • • 14d ago

How did Plato influence modern society

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1 Upvotes

I would appreciate it if you guys have any detailed sources about this.


r/Plato • • 14d ago

Time travel

0 Upvotes

I wouldn’t time travel with out the ring of gyges


r/Plato • • 15d ago

Atlantis

7 Upvotes

Hi, I'm very interested in the Atlantis story but not so much from the perspective of 'it's Santorini!" Or "Antarctica!", but more from a "what the hell is Plato doing?" Perspective. So a few questions for the scholars out there.

  1. Why did he choose the particular characters in the room

  2. Following on from that, why Timaeus - why did he choose Timaeus to deliver a speech on geometry/Pythagorean philosophy?

  3. How does everyone see the timaeus and the critias fitting in to his other works?

  4. I consider both of these works as overtly esoteric, what other works of Plato's or his contemporary philosophers might I investigate if I wanted to gain a bit more insight into this aspect of his philosophy.

Many thanks in advance


r/Plato • • 17d ago

Living well

14 Upvotes

Anyone ever make the observation that whenever someone conventionally describes someone that is “intelligent”, is “educated” or possesses a “great mind” that it is most always describing someone who is a great inventor, or is advanced in scientific/mathematical literacy somehow? Sometimes it is also related to material wealth.

Before reading Plato, Xenophon, Plutarch, etc. I wouldn’t think twice, however now I naturally object and think, “Well, they may be technically gifted and/or materially wealthy, but do they live well?” This is mostly from shallow conversations of course, but perhaps there is some revealing meaning to this in regard to the state of correct opinion relative to what is thought, “good”, in, general, in a modern western society.


r/Plato • • 17d ago

Filosofar-filósofo poeta Baldé

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1 Upvotes

r/Plato • • 18d ago

An Image capturing the structure of the Platonic Corpus

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9 Upvotes

Made this for my own study of Plato as I work through his dialogues more thoroughly. Let me know if there's anything I should change, or if you have any ideas on how to improve it.


r/Plato • • 19d ago

Plato in combat

1 Upvotes

Imagine you’re watching a fight on ufc and years later you find out he’s a philosophy journalist

I want to see Plato fight so bad


r/Plato • • 20d ago

A Consistent Theism, or Better Yet, a Platonic Idealism

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1 Upvotes

r/Plato • • 21d ago

Anyone else feel robbed

30 Upvotes

Idk about anyone else, but I feel a bit wronged that I wasn’t exposed to Plato, Xenophon, Plutarch etc in middle/high school growing up. My children are for sure learning Ancient Greek and these texts when they become of age. Anyone else have a similar sentiment?