Matthew Edney reviews Rasmus Grønfeldt Winther’s When Maps Become the World (University of Chicago Press, 2020), a philosophy of science book that engages with maps and representation—with what Winther calls “map thinking.” Edney isn’t convinced by Winther’s approach: “Winther remains committed to outmoded and deeply flawed concepts of the nature of ‘the map’ that, to be honest, call into question the entire project.”