| 1871, August 27 | Born at Geneseo, New York |
| 1893 | Received A.B. Wesleyan University |
| 1900 | Received A.M. Harvard University |
| Received Ph.D. Harvard University | |
| 1903-1904 | Instructor of History, Clark College |
| 1904-1909 | Assistant Professor of History, Clark College |
| 1909-1920 | Professor of History, Clark College |
| 1910, March 30 | Married Edna Frances |
| 1910-1922 | Editor, Journal of Race Development/ Journal of International Relations |
| 1914-1943 | Professor of History and International Relations, Clark University |
| 1918-1919 | Member of the Commission of Inquiry to prepare data for the United States Delegation to the Peace Conference |
| 1921 | Technical advisor to the American delegation at the Conference on Limitation of Armaments |
| 1922-1923 | Leader of Round Table, Institute of Politics |
| 1928,1930 | Williamstown, MA |
| 1927 | Visiting Carnegie Professor of International Relations to Universities in New Zealand, Australia, and Japan |
| 1930- 1946 | President, Board of Trustees, World Peace Foundation |
| 1931-32 | Consultant and Officer, U.S. Department of State Far |
| 1942-45 | Eastern Affairs Division |
| 1932 | Special Assistant to the American member of Lytton Commission |
| 1944-1954 | Professor Emeritus, Clark University |
| 1945 | Political Advisor to Gen. Frank McCoy, Chairman of Far Eastern Commission, which established policy for General MacArthur during the post-war occupation of Japan |
| 1954, May 5 | Died, Worcester MA |