 This section discusses the descriptive questions, starting with  (1a)  and  (1b);the  normative questions are addressed in  Section 3  on the moral debate. If one wants to enjoin people to struggle for their national interests, one must have some idea about what a nation is and what it is to belong to a nation. So, in order to formulate and ground their evaluations, claims, and directives for action, pro-nationalist thinkers have expounded theories of ethnicity, culture, nation, and state. Their opponents have in turn challenged these elaborations. Now, some presuppositions about ethnic groups and nations are essential for the nationalist, while others are theoretical elaborations designed to support the essential ones. The definition and status of the social group that benefits from the nationalist program, variously called the “nation”, “ethno-nation”, or “ethnic group”, is essential. Since nationalism is particularly prominent with groups that do not yet have a state, a definition of nation and nationalism purely in terms of belonging to a state is a non-starter.