President Donald Trump during a working session on the global economy, foreign policy and security affairs, at the G-7 summit in Biarritz, France, Aug. 25, 2019 (AP photo by Andrew Harnik).

In a provocative new book, three scholars from the libertarian Cato Institute—John Glaser, Christopher A. Preble and A. Trevor Thrall—counsel the United States to abandon the pursuit of global primacy for a policy of prudence and restraint. “Fuel to the Fire: How Trump Made America’s Foreign Policy Even Worse (and How We Can Do Better)” is a scalding indictment not only of the 45th U.S. president, but also of a morally bankrupt national security establishment whose addiction to empire has embroiled the nation in misbegotten military misadventures. American foreign policy professionals may cast the United States as a benevolent hegemon, […]