That a system is open means, not simply that it engages in interchanges with the environment, but that this interchange is an essential factor underl… - Walter F. Buckley

Openness is an essential factor underlying a system's viability, continuity, and its ability to change.

The more recent concern with complex adaptive organization has led to the notion of contingency as the important key. Thus Wiener, while working in the field of communications and probability theory, became convinced 'that a significant idea of organization cannot be obtained in a world in which everything is necessary and nothing is contingent'

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.

Don't simply blame the individuals involved in policy decisions (although they must shoulder the moral and legal responsibilities); blame the sociocultural structure within which they are enmeshed. Search for the role pressures, the premiums and penalties that result from doing or not doing things in certain ways, the goals held out with associated carrots and sticks, and the tensions generated by the often incompatible demands of peers, family, sub- and super-ordinates, politicians, and national flag