This volume tests a hypothesis—philosophy and science are identical forms of behavioristic, organizational psychology: a psychological habit of wondering about causes of organizational existence, formation, and behaviour. Focusing attention on two universal and culturally influential great ideas—freedom and religion—this volume’s array of international scholars demonstrate that leading ancient and medieval philosophers did philosophy in this way. Also, well-known philosophers/scientists like Mortimer J. Adler and John N. Deely practiced philosophy this way. Doing so is precisely what made these philosophers uniquely capable of generating great ideas as motivational principles that dramatically alter cultures. In a nutshell, this work offers significant support for its historically and philosophically ground-breaking thesis.