Scott McLemme of Inside Higher Ed reviews The Usefulness of Useless Knowledge (Princeton University Press, March 2017) by founding IAS Director Abraham Flexner with a companion essay by current IAS Director Robbert Dijkgraaf. Of the book, McLemme writes of Dijkgraaf's observation that “a healthy and balanced ecosystem would support the full spectrum of scholarship, nourishing a complex web of interdependencies and feedback loops.” The problem now, writes McLemme, is that such a healthy and balanced intellectual ecosystem is no less dependent on a robust economy in which...