It has been a science fiction phenomenon. President Obama loved it, it's a perennial Powell's Books best-seller. We debate its merits and drill down on "hard" vs. "soft" science fiction. We talk about the Thucydides Trap, who fears aliens, the history of science fiction in the west and Roman's karma with Philip K. Dick. Music: “Sunday Smooth" by Scott Buckley, used under a Creative Commons Attribution 4.0 International License - www.scottbuckley.com.au.