I've been watching a lot of science fiction lately and thinking back on all the sci fi I read back in high school. Today, the role of Earth in sci fi caught my mind. Earth is always portrayed in one of two ways: the center of it all, i.e. Star Trek or a long-forgotten myth, i.e. BSG, Asimov's Foundation, Firefly/Serenity. Earth is never portrayed in the most logical way, as the home of humanity, but no longer its most important center. Think about how Greece, Rome, and the former colonial powers of Europe are today. I think a sci fi novel with Earth as a nice place to visit, but no longer a major power would be very interesting to read.