Society is based on co-operation. It is the very basis of social life. Unless people cooperate with each other they cannot lead a happy and comfortable life. No society can be healthy and prosperous without co-operation. Family rests on co-operation with one another to live happily. Co-operation avoids mutual destructiveness and results in economy.
Along with co-operation, there is conflict in society. It is the cause of evolution. It makes us think of the process of struggle through which all things have come into existence. Maclver says that "Society is co-operation crossed by conflict".