“Since emotions are few and reasons many, the behavior or a crowd can be more easily predicted than the behavior of one person can. And that, in turn, means that if laws are to be developed that enable the current of history to be predicted, then one must deal with large populations, the larger the better. That might itself be the First Law of Psychohistory, the key to the study of Humanics. Yet.' R. Giskard Reventlov” RobotsEmpireAsimovPsychohistoryDaneelGiskard Book:Robots and Empire Source: Robots and Empire