The Frankfurt School (German: Frankfurter Schule ) is a school of social theory and philosophy associated in part with the Institute for Social Research at the Goethe University Frankfurt. Founded during the interwar period , the School consisted of dissidents who felt at home neither in the existent capitalist, fascist, nor communist systems that had formed at the time. Many of these theorists believed that traditional theory could not adequately explain the turbulent and unexpected development of capitalist societies in the twentieth century. Critical of both capitalism and Soviet socialism , their writings pointed to the possibility of an alternative path to social development. 
Although sometimes only loosely affiliated, Frankfurt School theorists spoke with a common paradigm in mind; they shared the Marxist Hegelian premises and were preoccupied with similar questions.  To fill in the perceived omissions of classical Marxism , they sought to draw answers from other schools of thought, hence using the insights of antipositivist sociology, psychoanalysis , existential philosophy , and other disciplines.  The school's main figures sought to learn from and synthesize the works of such varied thinkers as Kant , Hegel , Marx , Freud , Weber , and Lukács.