There were several movements during the 60s and 70s. Pop Art was still flourishing, there were Happening, Hard Edge, Minimalism, Op Art, etc.
My favourites: Judy Chicago, Georgia O'Keeffe, Frida Kahlo, Barbara Hepworth see http://www.arthistoryarchive.com/arthistory/feminist/20thcentury_feministartists.html
The ratification of a constitutional amendment banning discrimination on the basis of sex The passage of the equal rights amendment by Congress
The Feminine Mystique
Hippies.