 After Kondakov's death, Vernadsky was in charge of the Kondakov Seminar, which disseminated his view of Russian culture as the synthesis of Slavonic, Byzantine, and nomadic influences.In 1927, Michael Rostovtzeff and Frank A. Golder offered Vernadsky a position at Yale University in the United States.At Yale, he first served as a research associate in history (1927–1946), and then became a full professor of Russian history in 1946.