The two essays in this volume can be termed essential building blocks for constructing a systematic approach toward a theory of economic growth. Drawing on his noted quantitative studies of modern economic growth, Professor Kuznets presents his views on the complex growth process and analyzes the implications of such specific factors as population, urbanization, industrialization, agriculture, and trade between nations. He discusses the relationship of social and political structure to economic processes, and how economic growth is affected by international relations as well as by the internal conditions of the society.