Passage: Although he was born in Cologne in 1901, his parents moved to Vienna in 1910, and Eric Voegelin eventually studied at the University of Vienna. The advisers on his dissertation were Hans Kelsen and Othmar Spann. After his habilitation there in 1928 he taught political theory and sociology. While in Austria Voegelin began long-lasting friendships with Alfred Schütz and with F. A. Hayek.As a result of the Anschluss of Austria with Germany in 1938, Voegelin was fired from his job. Narrowly avoiding arrest by the Gestapo, and after a brief stay in Switzerland, he arrived in the United States. He taught at various universities before joining Louisiana State University's Department of Government in 1942. Voegelin remained in Baton Rouge until 1958 when he accepted an offer by Munich's Ludwig-Maximilians-Universität to fill Max Weber's former chair in political science, which had been unoccupied since Weber's death in 1920. In Munich he founded the Institut für Politische Wissenschaft. Voegelin returned to America in 1969 to join Stanford University's Hoover Institution on War, Revolution, and Peace as Henry Salvatori Fellow; here he continued his work until his death on January 19, 1985. He was a member of the Philadelphia Society.

Question: When did Voegelin return to America?
1969