Sovereignty have core meaning is supremacy of the state territories alongside others or without interference with other states, which is, supreme authority within a tetTitory, though the meanings given have varied across history. It is a modem notion of political authority. Historical variants can be understood along three dimensions, the holder of sovereignty, the absoluteness of sovereignty, and the intemal and external dimensions of sovereignty. The state is the political institution in which sovereignty is embodied. An assemblage of states fonns a sovereign states system. In tenns of treaty law, the 1933 Montevideo convention on the rights and duties of states 1 provides that "no state has the right to intervene in the internal and external affairs of another. Foristance Uganda cannot intervene with the affairs of Rwanda The history of sovereignty can be understood through two broad movements, manifested in both practical institutions and political thought. The first is the development of a system of sovereign states, culminating at the Peace of Westphalia in 1648. This allowed a ruler to determine the religion within his borders and represents both the internal and external aspects of sovereignty. Internal sovereignty means supreme authority within one's territory, while external sovereignty relates to the recognition on the part of all states that each possesses this power in equal measure. Contemporaneously, sovereignty became prominent in political thought through the writings of Machiavelli, Luther, Bodin, and Hobbes