Leonard David Eron (pronounced Ear- On) (April 22, 1920 – May 3, 2007) was an American psychologist who conducted one of the longest spanning longitudinal studies on aggressive behavior in children to date.
Eron was an author of many books, articles and a constant public policy advocate on Capitol Hill.
However, once his father died he decide to earn his bachelor's degree at the city college of New York, which he earned in 1941 After one semester of graduate work at Columbia University, (where he met his future wife, Madeline Marcus) pearl harbor was bombed and he was drafted into the army and chose the "ordnance" corps.
During the campaigns he experienced many horrors on the beach at Anzio and other battles, to which undoubtedly contributed to his future interests in aggressive behavior.
After completing his doctorate from the university of Wisconsin, Eron attended the 1948 meeting of the American Psychological Association in Philadelphia.
He reduced time at Yale and accepted a position at the Rip Van Winkle Clinic in Columbia county, New York.
He retired from Illinois in 1990, then spent the next 15 years at the university of Michigan dividing his time between the institute for social Research and the Department of Psychology.