American political scientist, one of the founders of modern political science, representative of the behavioralist approach in political science and one of the founders of the Chicago School of Sociology. He is considered the founder of the “subject field” of political psychology. Key ideas (including psychoanalysis of the biographies of political leaders) are set forth in the book Psychopathology and Politics (1930). Lasswell developed the problems of the functional approach to politics, used the methods of social psychology, psychoanalysis and psychiatry in the study of political behavior and propaganda.