The Principia Press was established to publish the works of noted psychologist J.R. Kantor (1888–1984). Proceeds from sales support The Center for the History of Psychology, housed at The University of Akron.
Two basic theses underlie this work. The first, the specificity theorem, signifies that logic is essentially concerned with specific events and not with universal and transcendent systems. The second, the interbehavioral theorem, implies that no matter how logic is defined, it entails a psychological dimension that must be taken into account.