But it should be recognized that the difficulties experienced by
those who, in the period before World War I, attempted to arrive at a "definition"
of the class position of clerical employees are somewhat the same as the
difficulties one must today confront in defining the intermediate strata
of modern employment. These difficulties arise, in the last analysis,
from the fact that classes, the class structure, and the social structure
as a whole, are not fixed entities but rather ongoing processes, rich in
change, transition, variation, and incapable of being encapsulated in formulas,
no matter how analytically proper such formulas may be. The analysis
of this process requires an understanding of the internal relations and
connections which serve as its motive power, so that its direction as a
process may be understood. Only secondarily does the problem arise
of "defining" the place of particular elements in the process, and this
problem cannot always be solved neatly and definitively, nor, it should
be added, does science require that it must be so solved (282-283).