Countries are legally formed and recognized through two connected steps: an entity has to meet the four criteria for statehood set out in the 1933 Montevideo Convention, and then other governments and international organizations have to treat it as a state. Satisfying the legal definition is the easier half. Recognition is a political act with legal consequences, and the gap between the two explains why some places function as countries for decades without full acceptance.
The Four Legal Criteria for Statehood
The standard legal test comes from Article 1 of the Montevideo Convention on the Rights and Duties of States, signed in 1933. It began as a regional treaty among 20 states in the Western Hemisphere, but its four requirements have become the reference point in international law for what makes a state:
- A permanent population living within the territory. No minimum number is specified.
- A defined territory. Borders don’t have to be perfectly settled, and an ongoing boundary dispute doesn’t disqualify a state, but the territory has to be identifiable.
- A government that exercises effective control, meaning it actually maintains order, provides services, and administers justice rather than just claiming authority.
- Capacity to enter into relations with other states, meaning the entity conducts its own diplomacy and isn’t a subdivision of another country or controlled from outside.
The Convention says nothing about economic self-sufficiency, democratic governance, or minimum size. Tiny states like Nauru meet the test with populations smaller than most cities.1The Avalon Project. Convention on Rights and Duties of States (inter-American); December 26, 1933
How New States Actually Come Into Being
The criteria describe the finish line. The political paths that get an entity there fall into four patterns.
Decolonization
The largest wave of state formation in modern history came from decolonization in the mid-20th century, when territories in Africa, Asia, and the Caribbean gained independence from European colonial powers. The UN General Assembly declared in 1960 that colonialism should be brought to a speedy end, and dozens of new states were admitted to the UN over the following two decades. Self-determination has its strongest legal footing in this colonial context.
Secession
Secession is when part of an existing state breaks away. Bangladesh emerged in 1971 from East Pakistan after civil war and Indian military intervention, joining the UN in 1974.2Office of the Historian. The South Asia Crisis and the Founding of Bangladesh, 1971 Eritrea separated from Ethiopia in 1993 after a decades-long armed struggle. South Sudan became independent in 2011 following a referendum under a peace agreement, and was admitted to the UN as its 193rd member state.3United Nations. UN Welcomes South Sudan as 193rd Member State
Dissolution
Sometimes an entire state fragments. The Soviet Union dissolved in 1991 into 15 independent countries. Czechoslovakia split into the Czech Republic and Slovakia on January 1, 1993. Yugoslavia’s breakup through the 1990s was violent and produced seven successor states over the course of a decade.
Unification
Unification is rarer. Tanganyika and Zanzibar merged in 1964 to form the United Republic of Tanzania.4U.S. Department of State. Background Notes: Tanzania East and West Germany reunified on October 3, 1990, when the former German Democratic Republic acceded to the Federal Republic of Germany under the Treaty on the Final Settlement, which ended the remaining occupation rights of France, the Soviet Union, the United Kingdom, and the United States and restored full German sovereignty.
Self-Determination and Its Limits
The legal principle groups seeking independence most often invoke is self-determination. The UN Charter treats it as a foundational purpose, and the 1966 International Covenant on Economic, Social and Cultural Rights states that all peoples have the right to “freely determine their political status and freely pursue their economic, social and cultural development.”5UN Office at Geneva. Self-Determination and Territorial Integrity
It collides with another bedrock rule. Article 2(4) of the UN Charter requires members to refrain from the threat or use of force against the territorial integrity or political independence of any state.6Codification Division Publications. Article 2 – Charter of the United Nations General Assembly resolutions have repeatedly stated that self-determination should not be read as authorizing action that would dismember a sovereign state.5UN Office at Geneva. Self-Determination and Territorial Integrity
So the right to self-determination does not automatically translate into a right to independence. The international community has been far more willing to support independence claims from colonial contexts than from minority groups inside existing states. Unilateral declarations of independence face deep skepticism, and most succeed only when overwhelming political or military facts on the ground force acceptance.
Does Recognition Create a State or Just Acknowledge One?
International lawyers have argued for over a century about whether recognition by other governments actually creates statehood or merely confirms it. The answer decides whether an entity that meets the Montevideo criteria but lacks recognition counts as a state.
The declaratory theory says statehood is a factual question. If an entity has a population, territory, government, and independence, it is a state, and recognition is a formality. This tracks the Montevideo Convention itself, which in Article 3 says a state’s political existence is independent of recognition by others.
The constitutive theory says the opposite. An entity becomes a state only when other sovereign states recognize it. Without recognition, it has no legal personality in international law, however effectively it governs.
Neither theory fully describes reality. The declaratory view can’t explain why entities like Somaliland — with a functioning government, defined territory, and stable population — are not treated as states. The constitutive view can’t explain why recognition is sometimes extended to entities with shaky control over their own territory. What actually happens is messier: recognition is a political act in legal dress, shaped by strategic interests as much as by legal analysis.
Why Recognition Matters in Practice
Whichever theory you find more convincing, recognition carries real consequences. A recognized state can open embassies, negotiate treaties, borrow from international financial institutions, and claim sovereign immunity in foreign courts. An entity without recognition hits walls at nearly every step.
Diplomatic immunity is one example. Under U.S. law implementing the Vienna Convention on Diplomatic Relations, lawsuits against people entitled to diplomatic immunity must be dismissed, but those protections only apply to representatives of entities the host country recognizes as states.7Office of the Law Revision Counsel. Chapter 6 – Foreign Diplomatic and Consular Officers
International courts are another. The Statute of the International Court of Justice provides that only states may be parties to cases before it. An entity that isn’t recognized as a state by enough of the international community effectively has no standing there.8United Nations Audiovisual Library of International Law. Statute of the International Court of Justice
The UN draws a careful line here. According to its own guidance, the United Nations is neither a state nor a government and “does not possess any authority to recognize either a State or a Government.” UN admission is a separate process that delivers many of the practical benefits of recognition without technically being recognition itself.9United Nations. About UN Membership
How the United Nations Admits New Members
UN membership is the closest thing to a universal seal of legitimacy. Article 4 of the Charter sets three conditions: the applicant must be a “peace-loving” state, must accept the obligations of the Charter, and must be judged able and willing to carry them out.10Codification Division Publications. Article 4 – Charter of the United Nations
Admission takes two steps, and most applications stall on the first. The Security Council has to recommend the applicant. That requires at least nine of the 15 members voting yes, and any of the five permanent members (China, France, Russia, the United Kingdom, and the United States) can block the recommendation with a veto. Vetoes have been used for political reasons unrelated to whether the applicant meets the Charter’s criteria.
If the Security Council recommends admission, the General Assembly votes. Admission is an “important question” under Article 18, so it needs a two-thirds majority of members present and voting.11United Nations Information Service Vienna. The UN in General Once an application clears the Security Council, the General Assembly vote is rarely in doubt.
The veto creates a political bottleneck. Palestine’s bid for full UN membership has been blocked at the Security Council despite recognition by well over 100 UN member states. The General Assembly granted Palestine non-member observer state status in 2012 by a vote of 138 to 9, a strong signal of support that still falls short of membership.12United Nations. General Assembly Votes Overwhelmingly to Accord Palestine Non-Member Observer State Status
Who Decides Recognition Inside the United States
In the U.S., the power to recognize foreign governments and states belongs exclusively to the President. The constitutional basis is the Reception Clause in Article II, Section 3, which directs the President to “receive Ambassadors and other public Ministers.” At the founding, receiving an ambassador was understood as recognizing the sending nation’s sovereignty, and the Supreme Court has read the clause to give the President sole authority over recognition.
The Court settled the point in Zivotofsky v. Kerry (2015), the first case in which it struck down a federal statute for infringing on the President’s exclusive recognition power. Congress had passed a law allowing U.S. citizens born in Jerusalem to list “Israel” as their birthplace on passports, which the Court found conflicted with the President’s official position on Jerusalem. Congress cannot pass a law that requires the President to override a recognition determination.13Justia US Supreme Court. Zivotofsky v. Kerry, 576 U.S. 1 (2015)
The factors the executive branch weighs are not written into any statute. They typically include whether the entity has effective control of its territory, whether its government has the consent of the population, and whether recognition serves broader U.S. foreign policy interests. The State Department maintains a list of independent states recognized by the United States.14United States Department of State. Independent States in the World
What Happens to Treaties When a New State Forms
The moment a new state emerges, an immediate question follows: does it inherit the treaties of its predecessor? The 1978 Vienna Convention on Succession of States in Respect of Treaties supplies the framework, though not every country has ratified it.
Newly independent states that emerge from decolonization get a “clean slate.” The new state is not automatically bound by treaties that applied to its territory under the predecessor.15United Nations Treaty Collection. Vienna Convention on Succession of States in Respect of Treaties
Dissolution and secession work differently. When a state splits, treaties that applied to the whole predecessor generally continue in force for each successor. The exception is where the states involved agree otherwise, or where applying the treaty to the successor would be incompatible with the treaty’s purpose or would radically change the conditions of its operation.15United Nations Treaty Collection. Vienna Convention on Succession of States in Respect of Treaties In practice this gets messy. After the Soviet Union dissolved, Russia claimed continuity as successor for purposes of the USSR’s Security Council seat and treaty obligations, while the other 14 former Soviet republics had to negotiate their treaty relationships one at a time.
Entities That Function Like States Without Full Recognition
Some of the hardest cases in international law involve entities that meet the Montevideo criteria but lack broad recognition, and they affect tens of millions of people.
Kosovo declared independence from Serbia in 2008 and has been recognized by roughly 90 UN member states, but Serbia and its allies, including Russia and China, have blocked Kosovo’s UN admission. Taiwan has functioned as an independent government since 1949, controls its own territory and military, and has one of the largest economies in Asia, yet only about a dozen countries formally recognize it. China’s position that Taiwan is part of its territory, combined with China’s Security Council veto, makes UN membership effectively unreachable under current conditions.
The daily consequences of non-recognition are concrete. Passports may not be accepted everywhere. Governments cannot claim sovereign immunity in countries that don’t recognize them. Joining multilateral treaties is complicated because other states may object. Citizens and businesses face frictions in commerce, banking, and travel that citizens of recognized states never see. By the Montevideo test, several of these entities plainly qualify as states. Without broad recognition, they remain in a legal gray zone: governing real populations and real territory while being formally invisible across much of international law.