"Socialism in America" conference
In late 1984, more than 700 people attended a conference at Princeton "Socialism in America" to mark the centenary of the birth of Norman Thomas.
The conference was organized by historians Gary Gerstle, Peter Mandler and Sean Wilentz.
Speaker included Michael Harrington, Maurice Isserman, Irving Howe, H. L. Mitchell, Millie Jeffrey, Harry Fleischman, Ben McLaurin, and Frances Fox Piven. 
DSA Conference delegate
In 1983 Peter Mandler was an At Large delegate to the Democratic Socialists of America conference in New York City, October 14-16, 1983
In 1990, Peter Mandler wrote and article for the Democratic Socialists of America, journal Democratic Left "Thatcher's Tax:Lessons for the Left.
In 1993 Peter Mandler taught in the Department of Politics and Modern History at London Guildhall University.He was a member of both DSA and the British Labour Party.
- ↑ Democratic Left, Nov./Dec. 1984, page 12
- ↑ DSA Conference delegate list Oct. 12 1983 update
- ↑ Democratic Left, May/June 1990
- ↑ Dem. Left MAY/JUNE. 1993 page 21