1913 – He earned an M.A. in English from the University of Illinois.
– He worked as a journalist in New York City and began writing books on history.
1931 – He was appointed Dewitt Clinton Professor of History at Columbia University.
1933 – He won the Pulitzer Prize for Biography or Autobiography.
1940 – He was later appointed Harmsworth Professor of American History at Oxford University.
1948 – He created the first oral history program to operate on an institutionalized basis in the U.S.
1971 – He died on the 5th of March.