Michael G. Long is a former Associate Professor of Religious Studies and Peace and Conflict Studies at Elizabethtown College.

Long is the author or editor of books on civil rights, religion, and politics, including Jackie Robinson: A Spiritual Biography; Gay Is Good: The Life and Letters of Gay Rights Pioneer Franklin Kameny; Beyond Home Plate: Jackie Robinson on Life after Baseball; Martin Luther King, Jr., Homosexuality, and the Early Gay Rights Movement; and Marshalling Justice: The Early Civil Rights Letters of Thurgood Marshall.

Long has written for the Los Angeles Times, the Chicago Tribune, USA Today, the Afro, the Huffington Post, the Chicago Sun-Times, New York Daily News, and the Pittsburgh Post-Gazette, and his work has been featured or reviewed in or on NPR, The New York Times, the Washington Post, the Los Angeles Times, the Boston Globe, USA Today, Salon, CNN, Book Forum, Ebony/Jet, and other newspapers and journals.

[citation needed] Long lives in Lower Allen Township (PA).

He received a Ph.D from Emory University in 2000.