He studied sociology at Ohio State University and received a bachelor's in 1953 and a master's in 1955.
He hosted a radio program on WBJC for 20 years and started Research Group One, a publisher of pamphlets.
In the 1980s, he began editing Social Anarchism and opened the alternative Baltimore School.
Ehrlich worked as research director of the University of Baltimore's National Institute Against Prejudice and Violence from 1986 to 1993, when it closed.
[1] Ehrlich published eight books including Hate Crime and Ethnoviolence (2009) and The Best of Social Anarchism (2013).