SOCIAL DIFFERENTIATION 197 
It is the social differentiation which has brought about 
this better distribution of freedom and restraint. It has 
destroyed the forced combination of heterogeneous indi- 
viduals and of heterogeneous interests of individuals in all- 
inclusive groups, and has created a social structure made 
up of associations that unite the homogeneous elements of 
heterogeneous circles. As a sociological form, this process 
of differentiation and integration manifests itself in the 
most varying social contents. But in the last analysis it is 
itself only a specific manifestation of a basic mental fune- 
tion which is operative in all fields of mental activity and 
most clearly manifest in the association of ideas. 
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Sh