This book traces the evolution of thought on economic integration from its early conceptualizations to the mid-20th century. Fritz Machlup, a distinguished economist, examines the theoretical underpinnings and historical developments that shaped the understanding of how national economies could merge or cooperate. The work analyzes the contributions of various economists and schools of thought, charting the progression of ideas regarding customs unions, free trade areas, and common markets.

Fritz Machlup's "A History of Thought on Economic Integration" is recognized as a foundational text for scholars and students of international economics and economic history. Its comprehensive review of the intellectual lineage of integration theories provides essential context for understanding contemporary global economic policy. The book is valued for its rigorous analysis and its detailed exploration of the academic discourse that has shaped this critical field.