History has thus far recorded principally the experience of tribes, cultures, classes, and nations. With the physical unification of the planet in this century and acknowledgement of the interdependence of all who live on it, the history of humanity as one people is now beginning. The long, slow civilizing of human character has been a sporadic development, uneven and admittedly inequitable in the material advantages it has conferred. Nevertheless, endowed with the wealth of all the genetic and cultural diversity that has evolved through past ages, the earth’s inhabitants are now challenged to draw on their collective inheritance to take up, consciously and systematically, the responsibility for the design of their future. It is unrealistic to imagine that the vision of the next stage in the advancement of civilization can be formulated without a searching reexamination of the attitudes and assumptions that currently underlie approaches to social and economic development. At the most obvious level, such rethinking will have to address practical matters of policy, resource utilization, planning procedures, implementation methodologies, and organization. As it proceeds, however, fundamental issues will quickly emerge, related to the long-term goals to be pursued, the social structures required, the implications for development of principles of social justice, and the nature and role of knowledge in effecting enduring change. Indeed, such a reexamination will be driven to seek a broad consensus of understanding about human nature itself. Two avenues of discussion open directly onto all of these issues, whether conceptual or practical, and it is along these two avenues that we wish to explore, in the pages that follow, the subject of a strategy of global development. The first is prevailing beliefs about the nature and purpose of the development process; the second is the roles assigned in it to the various protagonists. The assumptions directing most of current development planning are essentially materialistic. That is to say, the purpose of development is defined in terms of the successful cultivation in all societies of those means for the achievement of material prosperity that have, through trial and error, already come to characterize certain regions of the world. Modifications in development discourse do indeed occur, accommodating differences of culture and political system and responding to the alarming dangers posed by environmental degradation. Yet the underlying materialistic assumptions remain essentially unchallenged.