If there is any man in the last century who had a gift of forecasting the future of the human race, it was Carl Sagan. Some of his social and political commentary I recently heard in the audiobook version of his "Pale Blue Dot: A vision of the human future in space" in regard to the cold war, space race and nuclear disarmament is amazing.
Anyways, check out this segment of an interview I stumbled across while watching some vids of him on Youtube: Ted Turner asks Carl Sagan if he's a socialist. If I would like anyone to watch this, it's Der Fuhrer, F3lix and DJ FC. (Sorry it's not embedded, it's a long interview so I deep linked it.)
EDIT: Make sure you note how quickly he changes the subject to time travel.
YouTube - Ted Turner Interviews Carl Sagan (Part 3 of 5)