f261d427_lution_1936_1939___Sam_Dolgoff__The_Industrial_Organization
[The Political State] 4. In the State and its authoritarian institutions the people are divided by their necessarily varied and often conflicting political, religious, and social ideas and interests. It is precisely in these areas where people unavoidably differ most and in a free society should differ. [The Industrial Organization] 
4. Men group into unions according to their needs and occupations, and into free Communes according to locality and common interests. This is the area in which the common interests of all men are greatest.
The anarchist collectives: workers' self-management in the Spanish revolution 1936-1939 - Sam Dolgoff
The Industrial Organization