World-renowned economist Ronald W. Jones gets to the essence of international trade theory in this collection of articles that span over half a century of his published work. As the global economy has grown, so too has the need for a deeper rooted understanding of trade -- and its assorted benefits. With clear, simplifying prose, Jones elucidates the Ricardian, Heckscher-Ohlin, and Specific-Factors models of general equilibrium theory. Jones' pioneering work anticipates, among other changes in our time, the creation of far-flung supply chains brought about by the falling costs of service links. The theoretical, technical, and historical insights in the text are peppered with personal notes that capture modern intellectual development in the field, providing a bedrock foundation in international trade for students and practitioners alike.