The monograph is devoted to the psychological theory of law created by L.I. Petrazhitsky, in the light of modern psychology and sociology. The monograph explores such issues as: the methodology of psychological theory of law, the concept of emotion in modern psychology, the concept of legal and moral emotion, as well as the concepts of political, religious, scientific and aesthetic emotions. The author of the monograph justifies the existence of legal motivology and neuro-jurisprudence. He also considers the foundations of emotional sociology and the concept of the state as a socio-psychological phenomenon. The monograph is of interest to lawyers, psychologists, sociologists and everyone interested in the problems of modern psychology, theory, sociology and philosophy of law.