"Power concedes nothing without a demand." -Fredrick Douglas

I was talking about this recently, how there are so few optimistic sci-fi that I think it's speaks poorly to where we're heading. If we can't visualize a better world how are we going to work towards it? Other than Star Trek what scifi has an optimistic view of the future?

I've heard this before. Where does this claim come from? You can find the term conspiracy theory used as early as like the 1870s.