"This work had its origins in the question of the relations of the individual to social solidarity. Why does the individual, while becoming more autonomous, depend more upon society? How can he be at once more individual and more solidary? Certainly, these two movements, contradictory as they appear, develop in parallel fashion. This is the problem we are raising. It appeared to us that what resolves this apparent antinomy is a transformation of social solidarity due to the steadily growing development of the division of labor."