Far more than an intellectual puzzle for pundits, economists, and policymakers, economic growth--its makings and workings--is a subject that affects the well-being of billions of people around the globe. In The Mystery of Economic Growth, Elhanan Helpman discusses the vast research that has revolutionized understanding of this subject in recent years, and summarizes and explains its critical messages in clear, concise, and accessible terms. The tale of growth economics, as Helpman tells it, is organized around a number of themes: the importance of the accumulation of physical and human capital; the effect of technological factors on the rate of this accumulation; the process of knowledge creation and its influence on productivity; the interdependence of the growth rates of different countries; and, finally, the role of economic and political institutions in encouraging accumulation, innovation, and change.