It has become a staple among critics of American foreign policy to refer to the United States's approach as "liberal imperialism." By this they mean that America's globalist agenda and its willingness to use force in theaters across the globe derives from its desire to evangelize the gospel of liberalism and thereby extend the reach of a US-dominated democratic capitalist order. These critics point to the presidency of Woodrow Wilson and trace how this agenda evolved over the next century. The dominance of liberal ideology, they argue, is so all-encompassing that virtually all of the main variants within the modern US foreign policy tradition, from anti-communism to neoliberalism to neoconservatism, fit under liberalism's umbrella. In Republic in Peril, the eminent foreign policy scholar David C. Hendrickson turns this thesis on its head. A trenchant critic of America's quest for global dominance, Hendrickson argues not only that liberalism is not the culprit, but is in fact where we should turn because it offers a powerful critique of both militarized interventionism and the US quest for full-spectrum global dominance. Covering all of the major episodes of the past century, he shows how the US has fully abandoned a tradition of republican liberalism that dates back to the Founders. The republican liberal tradition, which dominated US foreign policy for over a century, mandated non-intervention and the promotion of peace. This "golden rule" policy toward other nations served America well, he contends, and many of the pathologies that plague US foreign policy now—particularly its disastrous approach to the Middle East—can be traced to the desertion of the republican liberal tradition. He therefore advocates returning to the more collegial form of internationalism ("iso-internationalism") that preceded Wilsonianism. Combining both a rich historical overview of modern American foreign policy with a forceful indictment of the illiberal straitjacket in which US has bound itself, Republic in Peril provides a genuinely original defense of liberalism in the service of peaceful non-intervention—a position that contemporary critics of aggressive liberalism are sure to find surprising.