1906 Born April 30, New York.
1927 Columbia University: awarded Bachelor of Science Degree, New York.

Studies sculpture at the Beaux Art Institute of Design, New York.

1930 Studies at National Academy of Design, New York.
1936 Participates in First American Artists’ Congress. Joins the Artists’ Union.
1937 Midtown Galleries, New York.
1940 Founds Federation of Modern Painters and Sculptors, as splinter group from American Artists’ Congress
(with Meyer Schapiro, Adolph Gottlieb, Mark Rothko, Ilya Bolotowsky, Bradley Walker Tomlin, David Smith and others).
1941 Elected to executive board, Sculptors’ Guild (along with Chaim Gross, Robert Laurent and Hugo Robus).
1950 Joins The Irascibles in protest against juried painting exhibition at the Metropolitan Museum of Art. Charter member, The Club.
1962-63 Visiting Professor: University of Pennsylvania, Philadelphia, Pennsylvania
1965-67 Visiting Professor: Rutgers University, New Brunswick, New Jersey.
1967 Associate Fellow: Morse College, Yale University, New Haven, Connecticut.
1979 Mellon Chair in Humanities, Visiting Professor: Rice University, Houston, Texas.
1991 Died in North Egremont, Massachusetts.