Political philosopher and professor. He taught at the University of Vienna, Stanford University, the University of Notre Dame, Louisiana State University, and the University of Munich and published a famous work entitled Science, Politics and Gnosticism.
He studied political science at the University of Vienna.
He and F. A. Hayek had a lifelong friendship.
He was born to German parents. He and his wife fled the Nazis in 1938 and eventually settled in the United States.
He published two books denouncing Adolf Hitler and the Nazi regime.