to predict or foresee
is the answer to “the Ultimate Question of Life, the Universe, and Everything.” (at least according science fiction novel “The Hitchhiker’s Guide to the Galaxy” :)
Psychohistory is a fictional science in Isaac Asimov's Foundation universe which combines history, sociology, and mathematical statistics to make general predictions about the future behavior of very large groups of people, such as the Galactic Empire (Wikipedia)
You'll become a Psychohistorian yourself if you rank very high in the Previse42 leagues. See you on the Leaderboard <3
Hari Seldon is a mathematics professor at Streeling University on planet Trantor. He developed the Psychohistory.
If you become the world number one in some Previse42 league, you'll receive the Hari Seldon badge!