Conducted some of the earliest and most extensive research on the human mind. He also introduced the premise of self-deception as a factor that prevents people from perceiving their true personality. He explained that it is the human superego through which morality develops and that, therefore, this is then transfused into traditional society, politics and the arts, which are substrates of collective morality and social conscience. This demonstrates a notable contrast to the ideas developed by Skinner. However, the dated hypotheses of Freud's theory suffer from a lack of scientific credibility and sufficient evidence to support the premises. Furthermore, Freud's assumptions do not have the ability to predict human behavior, but rather attempt to explain it. They cannot be used to control a society or to offer insight into the inner psychological machinations of human beings. Freud's theory is therefore inapplicable or incompatible with politics, and in most cases with the social sciences