He graduated from City College of New Yorkmagna cum laude with a Bachelor of Arts in 1975, from Columbia University with an M.A. in American History in 1976, and a Master of Philosophy in American History in 1978, and with a Ph.D. in 1993.
Who Built America? Volume 1: To 1877; Working People and the Nation's History, Authors Christopher Clark, American Social History Project, Nancy Hewitt, Joshua Brown, David Jaffee, Bedford/St. Martin's, 2007, ISBN 978-0-312-44691-8