" The two psychological tendencies that underlie modern leftism we call "feelings of inferiority" and "oversocialization."... By "feelings of inferiority" we mean not only inferiority feelings in the strict sense but a whole spectrum of related traits; low self-esteem, feelings of powerlessness, depressive tendencies, defeatism, guilt, self-hatred, etc. We argue that modern leftists tend to have some such feelings and that these feelings are decisive in determining the direction of modern leftism. "

― Theodore J. Kaczynski , Industrial Society and Its Future