Louis Hartz’s triumphalist manifesto for an enduring American liberal tradition, The Liberal Tradition in America (1955), certainly did not underestimate the role of ideology in American history, but it misinterpreted the origins of the nation’s prevailing ideologies. Hartz’s underlying argument that all American ideologies emerged from a liberal core contained a kernel of truth. But the terrain of American politics reveals that its political ideologies have been more complex than Hartz comprehended. Hartz’s fundamental misunderstanding of the ideology of the founders led him into problems in defining the liberalism that flourished in American life. Hartz’s insistence on explicating American liberalism ironically produced an original understanding of American conservatism, whether of southern slaveholders trying to fashion Tory conservatism or twentieth-century businessmen trying to insist that conservativism was consistent with the creative destruction that defines capitalism.