This seems to be essential to society. Those societies that don't have subordination to this system disappear. In industrial society there is an added decentralized regulation from industrialization. Cooperation is an essential part of society. Society cannot exists without cooperation and cooperation with our society.
People come together and cooperate together in order to reach common goals and ends.
Cooperation implies social organization, and there are two types of social organization in this area. Spontaneous cooperation, which is the consequence of people pursuing their private ends. Market transactions seem to be what Spencer is talking about. The second is cooperation that is consciously devised. This implies a distinct recognition of public ends.