In a class system, the social hierarchy is based primarily upon differences in monetary wealth and income. Social classes are not sharply marked off from each other, nor are they demarcated by tangible boundaries. Unlike estates, they have no legal standing, individuals of all classes being in principle equal before the law. Consequently, there are no legal restraints on the movement of individuals and families from one class to another... Unlike caste, social classes are not organized, closed groups. Rather, they are aggregates of persons with similar amounts of wealth and property, and similar sources of income.

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That a system is open means, not simply that it engages in interchanges with the environment, but that this interchange is an essential factor underlying the system's viability, its reproductive ability or continuity, and its ability to change.

This book is intended as an exploratory sketch of a revolutionary scientific perspective and conceptual framework as it might be applied to sociocultural systems. This point of view and still developing framework, as interpreted here, stems from the General Systems Research movement and the now closely allied fields of Cybernetics and information or communication theory.

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Basic ingredients of the decision-making focus include, then: (1) a process approach; (2) a conception of tensions as inherent in the process; and (3), a renewed concern with the role and workings of man's enlarged cortex seen as a complex adaptive subsystem operating within an interaction matrix characterized by uncertainty, conflict, and other dissociative (as well as associative) processes underlying the structuring and restructuring of the larger psychosocial system.

There is a revolutionary scientific perspective (stemming) from the General Systems Research movement and (with a) wealth of principles, ideas and insights that have already brought higher degree of scientific order and understanding to many areas as of biology, psychology and some physical sciences... Modern systems research can provide the basic of a framework more capable of doing justice to the complexities and dynamic properties of the socio-cultural system.

Adaptive system — whether on the biological, psychological, or sociocultural level — must manifest (1) some degree of "plasticity" and "irritability" vis-a-vis its environment such that it carries on a constant interchange with acting on and reacting to it; (2) some source or mechanism for variety, to act as a potential pool of adaptive variability to meet the problem of mapping new or more detailed variety and constraints in a changeable environment; (3) a set of selective criteria or mechanisms against which the "variety pool" may be sifted into those variations in the organization or system that more closely map the environment and those that do not; and (4) an arrangement for preserving and/or propagating these "successful" mappings.

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The notion of system we are interested in may be described generally as a complex of elements or components directly or indirectly related in a network of interrelationships of various kinds, such that it constitutes a dynamic whole with emergent properties.