It can be argued that, since the Cold War, conditions have changed, however the system itself has not been altered and, therefore, the theory of realism maintains its relevance and practicality. Despite claims that the emergence of non-state actors, globalization and undisputed unipolarity belie the applicability of realism, the proliferation of nuclear weapons, military spending and realism's continuing links to events in global politics, he argues that it is not obsolete. Despite the appearance of flaws within realist theory, it remains relevant to explaining international relations and how states interact with each other and with the anarchist world.