Nation-state in the context of "German unification"

The European Union created a Committee of the Regions to represent Regions of Europe as the layer of EU government administration directly below the nation-state level. The committee has its headquarters in Brussels.

A marriage of state is a diplomatic marriage or union between two members of different nation-states or internally, between two power blocs, usually in authoritarian societies and is a practice which dates back to ancient times, as far back as early Grecian cultures in western society, and of similar antiquity in other civilizations. The fable of Helen of Troy may be the best known classical tale reporting an incidence of surrendering a female member of a ruling line to gain peace or shore up alliances of state between nation-states headed by small oligarchies or acknowledged royalty.

Conservatism is a cultural, social, and political philosophy and ideology that seeks to promote and preserve traditional institutions, customs, and values. The central tenets of conservatism may vary in relation to the culture and civilization in which it appears. In Western culture, depending on the particular nation and the particular time period, conservatives seek to promote and preserve a range of institutions, such as the nuclear family, organized religion, the military, the nation-state, property rights, rule of law, aristocracy, and monarchy.

The 18th-century Anglo-Irish statesman Edmund Burke, who opposed the French Revolution but supported the American Revolution, is credited as one of the forefathers of conservative thought in the 1790s along with Savoyard statesman Joseph de Maistre. The first established use of the term in a political context originated in 1818 with François-René de Chateaubriand during the period of Bourbon Restoration that sought to roll back the policies of the French Revolution and establish social order.

Idealism in the foreign policy context holds that a nation-state should make its internal political philosophy the goal of its conduct and rhetoric in international affairs. For example, an idealist might believe that ending poverty at home should be coupled with tackling poverty abroad. Both within and outside of the United States, American president Woodrow Wilson is widely considered an early advocate of idealism and codifier of its practical meaning; specific actions cited include the issuing of the famous Fourteen Points.

Wilson's idealism was a precursor to liberal international relations theory, the particular set of viewpoints arising amongst the so-called "institution builders" after World War II. Organizations that came about as a direct result of the war's outcome include the International Monetary Fund (IMF) and the United Nations (UN) among others.

Nationalism is an ideology or movement that holds that the nation should be congruent with the state. As a movement, it presupposes the existence and tends to promote the interests of a particular nation, especially with the aim of gaining and maintaining its sovereignty (self-determination) over its perceived homeland to create a nation-state. It holds that the nation should govern itself, free from outside interference (self-governance), that a nation is a natural and ideal basis for a polity, and that the nation is the only rightful source of political power. It further aims to build and maintain a single national identity, based on a combination of shared social characteristics such as culture, ethnicity, homeland, language, politics (or government), religion, traditions or belief in a shared singular history, and to promote national unity or solidarity. There are various definitions of a "nation", which leads to different types of nationalism. The two main divergent forms are ethnic nationalism and civic nationalism.

The moral value of nationalism, the relationship between nationalism and patriotism, and the compatibility of nationalism and cosmopolitanism are all subjects of philosophical debate. Nationalism can be combined with diverse political goals and ideologies such as conservatism (national conservatism and right-wing populism) or socialism (left-wing nationalism).

Cultural nationalism is a term used by scholars of nationalism to describe efforts among intellectuals to promote the formation of national communities through emphasis on a common culture. It is contrasted with "political" nationalism, which refers to specific movements for national self-determination through the establishment of a nation-state.

Revanchism (French: revanchisme, from revanche, "revenge") is a policy or political doctrine aimed at a revenge or the reversal of the losses incurred in previous political or military defeats, most commonly, the incurred territorial losses. The term revanchism originated in 1870s France in the aftermath of the Franco-Prussian War among nationalists who wanted to avenge the French defeat and reclaim the lost territories of Alsace-Lorraine.

Revanchism draws its strength from patriotic and retributionist thought and is often motivated by economic or geopolitical factors. Extreme revanchist ideologues often represent a hawkish stance, suggesting that their desired objectives can be achieved through the positive outcome of another war. It is linked with irredentism, the conception that a part of the cultural and ethnic nation remains "unredeemed" outside the borders of its appropriate nation-state.