Liste de pays par date d'acquisition de la souveraineté
Résumé
Below is a list of sovereign states with the dates of their formation (date of their independence or of their constitution), sorted by continent.
This list includes the 195 states which are currently full member states or observer states of the United Nations. This does not include extinct states, but does include several states with limited recognition.
For proposed states or various indigenous nations which consider themselves still under occupation, see list of active autonomist and secessionist movements.
Nation-building is a long evolutionary process, and in most cases the date of a country's "formation" cannot be objectively determined; e.g., the fact that England and France were sovereign kingdoms on equal footing in the medieval period does not prejudice the fact that England is not now a sovereign state (having passed sovereignty to Great Britain in 1707), while France is a Republic founded in 1870 (though the term France generally refers to the current French Fifth Republic government, formed in 1958).
An unambiguous measure is the date of national constitutions; but as constitutions are an almost entirely modern concept, all formation dates by that criterion are modern or early modern (the oldest extant constitution being that of San Marino, dating to 1600).
Independence dates for widely recognized states earlier than 1919 should be treated with caution, since prior to the founding of the League of Nations, there was no international body to recognize nationhood, and independence had no meaning beyond mutual recognition of de facto sovereigns (the role of the League of Nations was effectively taken over by the United Nations after the Second World War). See also: disputed territories.
Many countries have some remote (or fantastically remote) symbolic foundation date as part of their national mythology, sometimes artificially inflating a country's "age" for reasons of nationalism, sometimes merely gesturing at a long and gradual process of the formalizing national identity.
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International recognition of Kosovo, since its declaration of independence from Serbia enacted on 17 February 2008, has been mixed, and international governments are divided on the issue. The Government of Serbia does not diplomatically recognise Kosovo as a sovereign state, although the two countries have enjoyed normalised economic relations since 2020 and have agreed not to try to interfere with the other's accession to the European Union.
La décolonisation des Amériques est le processus d'accession à l'indépendance des pays du continent américain. Guerre d'indépendance des États-Unis Les États-Unis ont été le premier pays du continent américain à obtenir son indépendance (par la guerre). La déclaration d'indépendance par rapport au Royaume-Uni date de 1776, elle a été reconnue par le traité de Paris en 1783. thumb|250px|Pays des Amériques par date d'indépendance. NB : Les États-Unis n'ont achevé leur expansion géographique à l'Ouest qu'en 1867.
thumb|Déclaration d'indépendance des États-Unis imprimée sur un tissu, vers 1876. Une déclaration d'indépendance est l'assertion, écrite ou non, d'un territoire défini, de son indépendance et qu'il constitue par la suite un État. La déclaration d'indépendance implique la rupture d'un territoire avec le reste d'un État dont il ne souhaite plus faire partie. Les déclarations d'indépendance officialisent alors cette rupture. Indépendance Séparatisme Sécession La Déclaration d'indépendance, tableau de John Trum