Following the Nazi 's 1938 Kristallnacht pogrom , Ritter became a founding member of the Freiburger Kreis , a discussion group whose focus was neo-liberal policy for the political economy . It was composed of anti-Nazi professors which included Adolf Lampe , Constantin von Dietze , Franz Böhm and Walter Eucken
Kristallnacht
Kristallnacht
Gerhard Ritter