This is science fiction that is character-driven on the surface and underneath propelled by intense psychological, philosophical, and political ideas. It presents a brutal confrontation of the facts of life for people desperate to survive and people who think they've created a utopia but don't realize until too late how wrong they were. I have now watched all four seasons and am so impressed by the work done by everyone on this project. It's superior entertainment that is of the people, by the people, and for the people.....