Reports on two types of unsolvability in mathematics. One is an instance of impossibility and the second is a judgment of undecidability. Presents a number of examples of undecidable propositions. (GS)

Describes a classification system based on interpersonal and economic resources which provides insight into the social problems of modern culture. Concreteness versus symbolism and particularism versus universalism are the coordinate pairs into which six categories of resources--love, services, goals, money, information, and status--are plotted.…

Presents the science of ekistics for systematic analysis of historical, contemporary, and proposed human settlements varying from individual to Ecumenopolis size. Five principles are described as applicable to all cities and applied to growing urban developments. Isolation of Dimensions and Elimination of Alternatives (IDEA method) is proposed for…

Presents evidence that the psychological principles that govern the perception of decision problems and evaluation of probabilities and outcomes produce predictable shifts of preference when the same problem is framed in different ways. (Author/SK)

This article focuses on content of the United States' Department of State Study called the Global 2000 Report issued by the Carter Administration on July 24, 1980. The report discusses the present trends which will lead to a more crowded, more polluted world, vulnerable to disruption. (Author/SA)