sentences:  The formulation of policy, both domestic and international, is then straightforward, it is simply the pursuit of the nation's identified national interest.The national interest of a state usually derived from its closely linked national identity and national narrative.For ethnic homelands with diasporas, there is conflict between the national identity of the homeland and the diaspora's ethnic identity—most obvious is the state's principal concern for only the people living within its boundaries, while the diaspora's is more broadly concerned for the transnational community.