The seventeen seminal essays by Robert J. Gordon collected here, including three previously unpublished works, offer sharply etched views on the principal topics of macroeconomics - growth, inflation, and unemployment. The author re-examines their salient points in a uniquely creative, accessible introduction that serves on its own as an introduction to modern macroeconomics. Each of the four parts into which the essays are grouped also offers a new introduction. The papers in Part I explore different key aspects of the history, theory, and measurement of productivity growth. The essays in Part II investigate the sources of business cycles and productivity fluctuations. Those in Part III cover the effects of supply shocks in macroeconomics. The final group presents empirical studies of the dynamics of inflation in the United States. The foreword by Nobel Laureate Robert M. Solow comments on the abiding importance of these essays drawn from 1968 to the present.