Anita Sarkeesian’s critiques of sexism in her Web series “Tropes vs. Women in Video Games” made her the victim of online harassment and threats from some in the gaming community, and a central figure of the Gamergate controversy of 2014. But Sarkeesian, who runs the Web site Feminist Frequency, hasn’t quit speaking out about sexism in the gaming world and beyond. She spoke with David Remnick about her new series, “Ordinary Women Daring to Defy History,” which tells the stories of neglected feminist heroes.