But again, it must be reiterated: neither change alone nor fixity alone can be the proper object of study by the functional analyst.  As we survey the course of history, it seems reasonably clear that all major social structures have in due course been cumulatively modified or abruptly terminated.  In either event, they have not been eternally fixed and unyielding to change.  But, at a given moment of observation, any such social structure may be tolerably well accommodated both to the subjective values of many or most of the population, and to the objective conditions with which it is confronted (1968, p. 95).