This book is divided into four parts: (1) Development and the minds of men, (2) Development: alpha and omega, (3) The cross-roads, and (4) Unesco at work: three places, three functions and a state of mind. Development theory and practice involves evaluation and judgment on the good society, on the good life for men and nations. In its broadest sense, it is political: it requires political judgment and decisions, on the means and ends of social and economic action. This book is a personal statement by the author and draws on his background in India, Unesco, and the science of economics for inspiration. The concept of development has emerged from the confrontation of welfare theory and the science of economics in a world characterized by accelerating political, social and economic change on the one hand, and a radical growth of interdependence on the other. This book explores in depth this science from the standpoint of one who has a great deal of experience in the field. (CK)