I am a big fan of shows like Star Trek, and Doctor Who. I have seen one very strong theme running through all of the shows and one that most people have a hard time grasping. We are constantly creating our future through our imagination.
What do I mean? Well the shows primary source of material is examining how will humanity develop. Do we want to be a war like race (Klingons), do we want to be greedy and only care about money (Ferengi), what about tech do we upgrade our bodies with no care of humanity (Cybermen). The list of villains in these shows normally depict the worst that we could be.
We use our imaginations to find out what things could be like and how we can fix the issues before we even reach the problems, we are a people that shape our world based on our thoughts.