He was born in New York City , and received his PhD from the New School for Social Research .
Sheldon Kopp ( 29 March 1929 -- 29 March 1999 ) was a psychotherapist and author , based in Washington , D.C. .
Sheldon Kopp was born in New York City , and received Sheldon Kopp 's PhD from the New School for Social Research .
Sheldon Kopp ( 29 March 1929 -- 29 March 1999 ) was a psychotherapist and author , based in Washington , D.C. .