Studies of such processes are examples of the constructivist attitude towards state interests and identities. Such interests and identities are central determinants of state behaviour, as such studying their nature and their formation is integral in constructivist methodology to explaining the international system. But it is important to note that despite this refocus onto identities and interests—properties of states—constructivists are not necessarily wedded to focusing their analysis at the unit-level of international politics: the state. Constructivists such as Finnemore and Wendt both emphasize that while ideas and processes tend to explain the social construction of identities and interests, such ideas and processes form a structure of their own which impact upon international actors. Their central difference from neorealists is to see the structure of international politics in primarily ideational, rather than material, terms.