Internal sovereignty theoretically means that the government of any state has supremacy over the people, resources and all other authorities within the territory it controls. The state is free to do everything within its territory and there is no other political entity or organ superior to the state. Therefore, internal sovereignty refers to the relationship of the state to events inside the sovereign domain.
External sovereignty is based on the notion that the territorial integrity of every state is inviolate. It could also be described as the legal identity of the state in international relations (Lansing, p. 300). External sovereignty, which has given the government of a country independence from outside authorities, is about international status; thus external sovereignty refers to the outside the domain's boundaries.
2.Historical Development:.
Sovereignty has had a long historical development, which has formed the basis of the theories. Human societies developed and formed new political communities. Accordingly, the type and the attributes of the supreme authority, or the sovereign, have also changed.
In the primitive human societies the strongest person in the community, who could best the other members of the community or caused them to fear his superior strength, enjoyed the sovereignty. He was the chieftain; the leader and everyone in the community had to obey him. In these types of communities the most powerful and skillful person exercised the sovereignty.
In the medieval period both rulers and ruled were subject to a legal order which derived its authority from the law of the God (Maritain, p. 355). It was the church, which provided the feudal order. In the feudal system the Christian community of the Church was associated with fixed and the eternal, while the cities were short-lived and changing. There were many small kingdoms, principalities and other institutions (churches, monasteries, guilds, universities, and merchants), that were enjoying special privileges and immunities.