The clear connection between the anti-imperialist movement and earlier movements for liberal reform has never received much attention," Christopher Lasch observed sixty years ago. Despite the distance of time, his observation still remains remarkably salient today. Most scholarship on the American Anti-Imperialist League (AIL, 1898(AIL, -1920 has continued to focus narrowly on the period between its founding in 1898 during the Spanish-American War and the end of the U.S. war in the Philippines in 1902. This chronological narrowing not only sidelines the continued anti-imperial activities of the AIL leaders in the years that followed; it also hides U.S. anti-imperial efforts to thwart transimperial projects in Africa, the Caribbean, and the Asia-Pacific in the decades that preceded the formation of the AIL. 1 Considering that historians have long associated free trade with late-nineteenth and early-twentieth-century Anglo-American imperialism, this story begins at what, at first sight, might seem an unlikely starting point: the mid-nineteenth-century Anglo-American free-trade movement. Although this might at first bring to mind imperial ambitions of worldwide market access, meaning access to an entire imperial world system, free-trade ideas in fact spurred U.S. anti-imperialism at the turn of the twentieth century. Going well beyond opposition to mercantilist policies intended to benefit particular empires, they contained a far larger imperial critique. Paying closer attention to the free-trade ideas that spurred turn-of-the-century American antiimperialists can help us locate what Jay Sexton and Ian Tyrrell recently described as "the lost cosmopolitanism of anti-imperialist adherents in the late nineteenth and early twentieth centuries." 2 The economic cosmopolitan motivations of American anti-imperialists have been either misrepresented or marginalized or both. 3 Recent scholarship on American anti-imperialist ideologies has tended to focus on culture and politics rather than economics. 4 The older "Wisconsin School" of diplomatic history did place due importance upon the economic ideas of AIL leaders. However, using a New Left brush, the Wisconsin School took the opportunity to paint the leading turn-of-thecentury anti-imperialists as informal imperialists. Wisconsinite scholars deemed all forms of U.S. economic expansion -including peaceful, non-coercive foreign market expansion -as imperialistic. Even the widespread pacific AIL advocacy of freetrade internationalism struck these scholars as an example of what Wisconsin School founder William Appleman Williams described as "imperial anti-colonialism." 5 This New Left rebranding thereby hid the extent to which the era's leading antiimperialists opposed not only formal imperialism but also informal economic imperialism. 6 This chapter argues that the AIL leadership's widespread subscription to freetrade ideas, emanating from the metropolitan heart of the British Empire, underpinned their anti-imperial moralism. The British-born free-trade ideas of the 1830s and...