James Burke: Connections, Episodes 1-10 (1978) [video]
I've always been fascinated by his follow up series "the day the universe changed".  He points out that as our beliefs and understandings shift, our universally perceived reality changes.He demonstrates this with a witch burning three hundred years ago. Those people believed that everything the felt and did was absolutely justified - if not required - by the universe they inhabited.It has always made me wonder what a future society will not be able to relate to how we live now.  Personally, I suspect eating meat will be off the table, as it were. (And I say this as a carnivore with a tin of bacon fat in the fridge.)When informing people whom they should vote for (I can be annoying like that) I try to get them to vote for someone that can inch us to the future they want to see.Not surprisingly, universal healthcare, decreased poverty and things that taste like bacon but aren't really bacon are all things people seem to expect in 1000 years.