A character in Isaac Asimov's Foundation Series. He creates the idea of psychohistory. Using this new field of science he predicts the fall of the Galactic Empire and a 30,000 year dark age. To shorten this period and preserve the knowledge the human race has aquired to this point he sets up the Encyclopedia Foundation staffed with the best scholars and scientists of the Empire. He sends them to a planet on the edge of the galaxy called Terminus.