The very fact that a new world order has emerged following the collapse of Soviet Union in particular and the Communist Bloc in general demands a shift in our focus of attention while analysing the interactions of the states. The very nature of nation-states itself has profoundly changed. The mutations on sovereignty of nation-states, which are caused by neoliberal globalisation, are unprecedented and apparently irreversible. New institutions have emerged at the international level and they exert greater influence over the policy formulations even by the nation-states that are marginally integrated to the world market.
Tradionally, the international system has been indeed seen as a world of sovereign states. States have the monopoly of power within a given territory and claim to represent the interests of the subjects of its rule. A state is primary unit at the international level. Constitutional independence is a defining character of a legitimate state. All states are considered equal in front of the international law. As opposed to the theoretical situation, we can see that the interactions between and among the states at the international level do involves relations of power. Many theorists of international politics have observed that powerful states are able to incorporate their desired ends to the international laws and mobilise what they want from the other states that have lesser resources.
The very conception of political is different for realism and liberalism. The political is conceived as the means to certain ideals in liberal theory such as democracy and liberty. Antagonistically, realism sees politics as characterised by conflict. Realism is also known as political realism. Classical realism, neorealism and neoclassical realism are the major varieties of realist thinking. On the other hand, liberal