Jonathan Rosen­berg, pro­fes­sor of twen­ti­eth-cen­tu­ry US his­to­ry at Hunter Col­lege and the CUNY Grad­u­ate Cen­ter, is author of How Far the Promised Land? World Affairs and the Amer­i­can Civ­il Rights Move­ment from the First World War to Viet­nam. He lives in Cro­ton-on-Hud­son, New York.