If I had to choose a philosopher I'd choose Socrates—even if he is a fictional character created by Plato. His death is a stark example of how flawed we can be in group-mind. True two thousand years ago as much as it is today in the current social climate.

Yes, there are things I find him guilty of. Most critically, of being so hellbent on educating others through ridicule. In aiming toward an ideal, Socrates failed to find the compromise that could have led his contemporaries to recognize their own limitations without it being at the cost of his own life. But, in aiming toward this ideal, he left us a sharp example of what to be both as individuals and as a people.