The Guerrilla Girls have been “making trouble” since 1985. They distribute sharp, well-designed feminist leaflets, booklets, and books. They appear at lectures and interviews in their signature gorilla masks, critiquing the art world’s underrepresentation of female artists. They adopt the names of the deceased—pioneering women such as Frida Kahlo, Alice Neel, Gertrude Stein. “We could be anyone,” one of the “girls” has said. “We are everywhere.” This exhibition traces the story of the group, dubbed “the conscience of the art world,” as it turns 40. —Elena Clavarino