St. Bonaventure University John Robert Greene is an American historian and writer who was the Paul J. Schupf Professor, History and Humanities, the director of the History Program, co-director of the History/Social Science major, and the College Archivist, at Cazenovia College in Cazenovia, New York.

In 1975 Greene changed his focus to secondary education, and in 1977 he received his Bachelor of Arts in history, with a New York State teaching certification in Social Studies (7-12).

In 1978 Greene entered the Ph.D. program in American History at Syracuse University's Maxwell School of Citizenship and Public Affairs.

He completed his doctorate under the advisership of David H. Bennett in October 1983; his dissertation explored "The Presidential Election of 1952.

Greene has appeared on many media outlets, including C-SPAN,[3] MSNBC, USA Today,[4] and PBS.