Since the 2008 financial crisis, the history field has seen a precipitous decline in the number of bachelor’s degrees awarded in American colleges. As Benjamin Schmidt, a historian at Northeastern University, reported in the American Historical Association’s Perspectives, the number of history degrees awarded fell by 30 percent—from 34,642 to 24,266 in just nine years from 2008 to 2017. History’s steep decline is not an anomaly, but part and parcel of a broader “crisis” in the humanities. STEM has steamrolled these disciplines on college campuses: Computer science has more than doubled its students between 2013 and 2017. Moreover, critics have...