Ex. you must always finish your enemy when u have the chance. Ethics and morality do not play a role in extosential war the survival of a society. But if it is a limited war (minor conflicts) there should be ethics and morale. The most known and popular modern realist. States the major assumptions of the realists. Modern realists assume politics is a science because it is based on laws that are unchanging (universal loaws of politics the understanding of human nature) The state is the most important because it controls the principle instruments of violence. Ex the military, bombs nuclear weapons: unitary rational actor. Raison de tat: the international system is anarchic. This means that the international system has no meaningful higher authority to regulate it. Controversy: the un claims to be above the state but they are only effective at the margins. For the most part they do not play a big role.