The rapid growth of the field of international political economy since the 1970s has revived an older tradition of thought from the pre-1945 era. The Contested World Economy provides the first book-length analysis of these deep intellectual roots of the field, revealing how earlier debates about the world economy were more global and wide-ranging than usually recognized. Helleiner shows how pre-1945 pioneers of international political economy included thinkers from all parts of the world rather than just those from Europe and the United States featured in most textbooks. Their discussions also went beyond the much-studied debate between economic liberals, neomercantilists, and Marxists, and addressed wider topics, including many with contemporary relevance, such as environmental degradation, gender inequality, racial discrimination, religious worldviews, civilizational values, national self-sufficiency, and varieties of economic regionalism. This fascinating history of ideas sheds new light on current debates and the need for a global understanding of their antecedents.