ABSTRACT
A truism underlies this chapter. That is, you have to define “change” not only before you can estimate whether or not it occurs in a specific case, but also before you can estimate how much of “it” occurs. In this strict sense, then, the preceding chapters should be viewed tentatively, for neither the several researches nor this treatment yet have been specific about kinds of change. The time has come to begin to rectify that major shortcoming, if only in preliminary ways.
