Everyone has a favorite line from the Guerrilla Girls’ famous poster The Advantages of Being a Woman Artist , I learned while eavesdropping at their recent Getty exhibition. My own might be the piercing seventh item: “Seeing your ideas live on in the work of others.” Or maybe the perfectly understated, perfectly deadpan opener: “Working without the pressure of success.” The Getty holds a substantial archive of the Guerrilla Girls’ working papers, dating back to their beginnings as an anonymous activist collective in 1985. Vitrines show multiple typewritten and handwritten drafts of The Advantages of Being a Woman Artist , which they made in 1988. The drafts are covered with editorial notes and revisions, suggesting the atmosphere of a comedy writers’ room, with everyone working over the jokes until they’re exactly right. The initial idea for Advantages had two columns running down the page, with the perks of being a male artist on the left side and those of being a female one on the right.…