Someone who "goes back to the land" after the industrial period. A homesteader in today's society.
Watch the documentary 'Urban Roots' for the best examples. Similar movement in Flint, Michigan called "Flintopia."
Guy: "Why would you move to Flint, Michigan?
Other Guy: "To take back the land, I'm a PIP."
Guy: "A PIP?"
Other Guy: "Yea, a Post-Industrial Pioneer."