In nature there prevail irreconcilable conflicts of interests. The means of subsistence are scarce.
Proliferation tends to outrun subsistence.
Only the fittest plants and animals survive. The antagonism between an animal starving to death and another that snatches the food away from it is implacable. Social cooperation under the division of labor removes such antagonisms. It substitutes partnership and mutuality for hostility. The members of society are united in a common venture.