Philip K. Dick 
Variable Man 

Philip Kindred Dick (December 16, 1928 – March 2, 1982) was an American novelist, short story writer, essayist and philosopher whose published work is almost entirely accepted as being in the science fiction genre. Dick explored sociological, political and metaphysical themes in novels dominated by monopolistic corporations, authoritarian governments, and altered states. In his book "The Variable Man" The Terran system is growing and expanding all the time. But an old and corrupt Centaurian Empire is holding Terra down, as it encircles the Terran system and will not let the humans grow out of their current empire. For this reason Terra is at war with Proxima Centauri and is trying to find a way of breaking free from the Centaurian’s hold upon them.(Excerpt from Wikipedia)