Uncertain Worlds is a definitive presentation of the evolution of world-systems analysis from the point of view of its founder, Immanuel Wallerstein. The book includes a one-of-kind interview with Wallerstein by Carlos Rojas, a conversation between Wallerstein and Lemert about the history of the field as it has come down to the present time, a long essay by Lemert on the uncertainties of the modern world-system, as well as a preface by Rojas and a concluding essay by Wallerstein. No other book lends such biographical, historical, and personal nuance to the biography of world-systems analysis and, thus, to the history of our times.