Slant Board. 1961

“Before moving to New York in 1959, choreographer Simone Forti spent four heady, formative years in San Francisco. There, she trained with the postmodern dance pioneer Anna Halprin, who rejected the stylistic constraints of ballet and modern dance. On Halprin’s outdoor dance deck in wooded Marin County, Forti explored improvisation, her motions guided by a keen alertness to the body’s anatomy. She also organized open-work sessions with her then husband, the Minimalist artist Robert Morris, gathering artists for communal, multidisciplinary explorations of movement, objects, sound, and light. At the end of the decade, Forti and Morris moved east. In New York, she began developing the pieces she eventually called Dance Constructions: dances based around ordinary movement, chance, and simple objects like rope and plywood boards. First performed in 1960 at the Reuben Gallery in Soho, and then in Yoko Ono’s loft the following year, they marked ‘a…