This book is about the crises of the world economy that have occurred from the 1970s to the present day. It makes the specific case that the global economy has experienced six crises during this 50-year period. Crises of the global economy are periods of substantial slowdown in world economic activity—as measured by investment, industrial production, trade, or unemployment—in which many national economies are technically in recession. To pose the existence of crises of the global economy implies that the world economy is a real entity with its own dynamics; it implies also that the usual approach that views national economies as the appropriate units of economic analysis has major limitations. The author provides data illustrating the global and regional manifestations of these crises of the world economy, elaborates on the concepts of world economy and economic crisis, and discusses the theories that have been used to explain them. The book shows how these recurrent global crises are discrete, countable phenomena, distinct states of an entity that can be appropriately referred to as the world or global economy, or world capitalism.