[1] Born in Brooklyn, New York in a Jewish family, Fajans joined the Young Communist League USA in 1932 and became involved in union organizing at Macy's department store.
[2][3] His activism continued with his service in the Lincoln Brigade during the Spanish Civil War, where he was wounded.
Bill, he transitioned into filmmaking, becoming known for his work on Salt of the Earth, a documentary about a New Mexico zinc miners' strike, notable for its depiction of labor and gender issues.
The film, however, led to Fajans being blacklisted, which forced him into freelance work and teaching filmmaking at the School of Visual Arts in New York City.
[1] Fajans died of a heart attack in 1968 at the age of 52, during a resurgence of interest in his film career.