A sovereign state is a state that has the highest authority over a territory. International law defines sovereign states as having a permanent population, defined territory, a government not under another, and the capacity to interact with other sovereign states. It is also commonly understood that a sovereign state is independent.
According to the declarative theory of statehood, a sovereign state can exist without being recognised by other sovereign states. Unrecognised states will often find it difficult to exercise full treaty-making powers or engage in diplomatic relations with other sovereign states.
Since the end of the 19th century, almost the entire globe has been divided into sections (countries) with more or less defined borders assigned to different states. Previously, quite large plots of land were either unclaimed or deserted, or inhabited by nomadic peoples that were not organized into states. However, even in modern states, there are large remote areas, such as the Amazon's tropical forests, that are either uninhabited or inhabited exclusively or mainly by indigenous people (and some of them are still not in constant contact). There are also states that do not exercise de facto control over their entire territory, or where this control is disputed.
Currently, the international community includes more than 200 sovereign states, most of which are represented in the United Nations. These states exist in a system of international relations, where each state takes into account the policies of other states by making its own calculations. From this point of view, States are integrated into the international system of special internal and external security and legitimization of the dilemma. Recently, the concept of the international community has been formed to refer to a group of States that have established rules, procedures and institutions for the implementation of relations. Thus, the foundation for international law, diplomacy between officially recognized sovereign states, their organizations and formal regimes has been laid.
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A centralized government (also united government) is one in which both executive and legislative power is concentrated centrally at the higher level as opposed to it being more distributed at various lower level governments. In a national context, centralization occurs in the transfer of power to a typically unitary sovereign nation state. Executive and/or legislative power is then minimally delegated to unit subdivisions (state, county, municipal and other local authorities).
The Korean Provisional Government (KPG; ), formally the Provisional Government of the Republic of Korea, was a partially recognized Korean government-in-exile based in China during the period of Japanese colonial rule in Korea. The KPG was first founded in Shanghai on 11 April 1919. A provisional constitution providing for a democratic republic named the "Republic of Korea" was enacted. It introduced a presidential system and three branches (legislative, administrative and judicial) of government.
The Montevideo Convention on the Rights and Duties of States is a treaty signed at Montevideo, Uruguay, on December 26, 1933, during the Seventh International Conference of American States. The Convention codifies the declarative theory of statehood as accepted as part of customary international law. At the conference, United States President Franklin D. Roosevelt and Secretary of State Cordell Hull declared the Good Neighbor Policy, which opposed U.S. armed intervention in inter-American affairs.
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