Explanation: Plato's Republic is a text which was a legitimately major contribution to the development of Western philosophical thought.
It's also fucking insufferable, as it takes the form of a 'dialogue' wherein Socrates (here acting as Plato's mouthpiece, whatever the real Socrates' opinions) has a discussion with the two easiest convinced men in all of Greece. "Yes. That is so. I would have to agree!"
... they're not particularly unassailable arguments presented either.