State sovereignty refers to the supreme authority of a state to govern itself without external interference. It embodies the principle that each state has the right to control its own territory, create laws, and manage resources, forming the basis for international relations. This concept asserts that states are equal under international law, allowing them to negotiate treaties and engage in diplomacy as independent entities. However, challenges such as globalization and interventionism can complicate pure sovereignty claims. Overall, state sovereignty is vital for maintaining order and protecting a nation's interests within the international arena.