Each state pursues its own interest's, however defined, in ways it judges best. Force is a means of achieving the external ends of states because there exists no consistent, reliable process of reconciling the conflicts of interest that inevitably arise among similar units in a condition of anarchy.
Kenneth WaltzAsking who won a given war, someone has said, is like asking who won the San Francisco earthquake. That in war there is no victory but only varying degrees of defeat is a proposition that has gained increasing acceptance in the twentieth century.
Kenneth Waltz