"To put it crudely: evolution has left a few screws loose between the neocortex and the hypothalamus." Thus Arthur Koestler defines his hypothesis of "schizophysiology" in Janus. Written towards the end of his life this book serves as a summation of his earlier scientific writings -- among them "The Act of Creation," "The Case of the Midwife Toad" and "The Ghost in the Machine." Schizophysiology is a condition which Koestler sees as singularly human. It seeks to explain "the chronic, quasi-schizophrenic split between reason and emotion" and does so by an evolutionary argument. Outstanding and thought-provoking whether you agree or disagree with his process or conclusions!