If you’ve heard klezmer music, been drawn to Yiddish, or thought about women’s engagement with social causes in Eastern Europe, you’ve likely been affected by the work of Adrienne Cooper, the influential singer and Yiddishist who died in December. Cooper said of interest in Yiddish music, language and culture among younger generations: “This culture belongs to them. They have a right to take it, to create something of their own in it.