The booklet discusses America's changing role in world affairs. The ideas, concepts, and theories were developed by participants in a workshop on American leadership held at the Aspen Institute for Humanistic Studies in August, 1976. The document is presented in ten chapters. The first chapter identifies new cooperative attitudes as the basis for the third try at world order. Reasons are offered for the failure of the first try, the League of Nations, and the second try, the United Nations. Chapter II characterizes the modern world as a leaderless entity which is no longer managed from Washington, and is not managed from anywhere else. Chapter III examines international interdependence in technology, economics, politics, and morals. Chapter IV outlines attitudes toward interdependence in third world nations and in the United States, followed by a call to Americans to translate interdependence into an agenda for action in Chapter V. This action agenda, discussed in chapters VI through IX, consists of moderating weapons races; staying inside ecological limits; handling international problems; and coping effectively with interdependence within the United States. The final chapter examines attitude changes in the United States toward consumerism, family planning, the status of women, and environmental protection. The conclusion is that the third try at world order may succeed where previous attempts have failed because of more advanced technology, an increased awareness of the need for restraint, and a new sense of economic and technological cooperation. (Author/DB)