While one should always remain wary of that happening, I would like to emphasize that philosophical (and thus ideological) thinking has come a long way since antiquity. Fighting for high principles - and seeing them carried through - is possible, and does still happen.

By lacking a robust philosophical framework with which to envision a society entirely without slavery, on the other hand, the slave revolts of antiquity were robbed of even the possibility of carrying forward such high ideals.