A lot of science fiction shows present a darkly dystopian view of the future, where humans battle for limited resources and are starkly divided between the haves and have-nots. But some views of the future are far more utopian and techno optimistic. In “Star Trek,” members of the federation live in a post-money society: Everyone has the basics, nobody must work, and ordering what you need is as easy as telling a replicator “Tea. Earl Grey. Hot.”