Plato conceived of philosophy as necessarily gregarious rather than solitary. The exposure of presumptions is best done in company, the more argumentative the better.

When the first people started to argue against slavery, for example, this was a new idea. If you crowd-source, you'd never come up with this. And so the - exactly the kind of progress we've made couldn't be made if we depend it on crowd-sourcing.

I like that there are so many different ways of looking at the world and I like all of the particular narratives. In any case we will never all see the same way on these [religious] issues. It's the way liberals and conservatives will never see the same way on individuals whereas it’s different orientations and they go too deep down and when we're dealing with questions that can't be definitively answered by science that's where you're sort of... your orientation swells in to fill up the gaps and so we're never always going to agree.

So Socrates was a kind of gadfly. He was a sort of philosophical urban gorilla hanging around in the middle of Athens, asking these peculiar questions of everybody - important people, young men, slaves - questions that had to do with ultimately what's the life that's worth living. And Plato was one of the young men who hung around him, a very aristocratic young man, came from a very old, important family.

Participation in the collective life of the polis both restrains the extraordinary individual and enlarges the ordinary individual, allowing him to participate in the extraordinary. An individual can achieve participatory excellence via the accomplishments of the polis and need not always be caught up in the agnostic struggle to outdo his peers.

When you ask why did some particular question occur to a scientist or philosopher for the first time, or why did this particular approach seem natural, then your questions concern the context of discovery. When you ask whether the argument the philosopher puts forth to answer that question is sound, or whether the evidence justifies the scientific theory proposed, then you've entered the context of justification. Considerations of history, sociology, anthropology, and psychology are relevant to the context of discovery, but not to justification.

Paraphrasing Plato's Republic: "Only people who have allowed themselves to be reformed by reality have it in themselves to reform their polis for the better."