Henning Mankell said this quote

There is no such thing as a world without combat, no civilization which doesn't start off by laying down the rules for relations between people. But the rules are there for the weak. The strong man experiments to find out how far they can be stretched, he creates his own rules. You would like everything to be based on the goodwill and charity of one's fellow men. But if there is no private profit to be made, there will be no progress.