Sovereign state

A sovereign state is a political entity that occupies a defined territory, has a permanent population, exercises government, and possesses the power to make decisions regarding its internal and external affairs independently. The term "sovereignty" refers to the supreme authority that exists within a territory and is not subordinate to any external power.

The system of sovereign states that exists in the world today rests on the principle that each state is equal under international law, regardless of the size of its territory, population, or economic capacity. This idea is generally traced to the development of the state system in Europe during the 17th and 18th centuries, particularly the Peace of Westphalia in 1648.

Core attributes

The standard definition—as summarized in the Montevideo Convention of 1933 on the Rights and Duties of States—identifies a state by four criteria: a permanent population, a defined territory, a functioning government, and the capacity to enter into relations with other states. These criteria are used as measures, but they are not applied as rigid requirements in practice.

Recognition

There are two major theories concerning the role of recognition. The declarative view holds that statehood exists when criteria are met, and recognition by other states is merely acknowledgment. The constitutive view holds that recognition is part of the process of creating statehood. In practice, recognition by other states and membership in international organizations—such as the United Nations—significantly affect a state's ability to function in the international arena.

Internal and external sovereignty

Internal sovereignty refers to a state's power to enact laws, collect taxes, maintain security, and carry out decisions within its territory. External sovereignty refers to a state's freedom to enter into agreements, conduct diplomatic relations, and act without interference in its affairs. The two can vary independently: a state with international recognition may lack actual control over parts of its territory.

Limitations and contested cases

States voluntarily limit aspects of their sovereignty when they join treaties and international organizations, such as trade regimes or regional unions. There also exist territories that claim statehood but receive limited recognition, and entities with widespread recognition but limited actual governing power within their borders. These cases show that statehood exists along a spectrum rather than as a simple binary condition.