• Scope: Popular sovereignty primarily pertains to the legitimacy and authority of a government within its existing boundaries. It is concerned with the relationship between the government and its citizens, emphasizing the principle that political power originates from and is subject to the will of the people.
• Usage: Popular sovereignty is commonly discussed in the context of constitutional law, democratic theory, and political philosophy. It is a foundational concept in the study of democratic governance and constitutional design, addressing issues such as the structure of government, electoral systems, representation, and individual rights. Discussions of popular sovereignty often revolve around questions of democratic legitimacy, citizen participation, and the protection of civil liberties.

Territorial sovereignty: Territorial sovereignty refers to the exclusive authority and control exercised by a government over a defined geographical area or territory. It encompasses the government's ability to assert its jurisdiction, enforce laws, and regulate activities within its borders without external interference. Territorial sovereignty implies that the government has the sole right to make and enforce laws, levy taxes, administer justice, and maintain order within its territory. This concept also encompasses the government's responsibility to defend its borders, protect national security, and manage natural resources within its jurisdiction. Territorial sovereignty is a fundamental aspect of statehood and is recognized as a key element of international law, entitling states to autonomy and non-interference in their internal affairs.

• Scope: Territorial sovereignty focuses on the geographical extent of a state's authority and control over its territory. It pertains to the exclusive right of a government to exercise its powers within a defined geographical area, including the enforcement of laws, regulation of activities, and defense of borders.
• Usage: Territorial sovereignty is relevant in various contexts related to international relations, law, and geopolitics. It is a key concept in the study of statehood, sovereignty, and international law, particularly concerning issues such as border disputes, territorial claims, and the cession of territory. Discussions of territorial sovereignty often involve considerations of national security, resource management, and diplomatic relations between states.

In summary, while both "popular sovereignty" and "territorial sovereignty" are fundamental concepts in political theory and international relations, they have distinct scopes of use. Popular sovereignty primarily concerns the relationship between the government and its citizens within existing boundaries, focusing on democratic governance and constitutional legitimacy. In contrast, territorial sovereignty relates to the geographical extent of a state's authority and control over its territory, encompassing issues of statehood, borders, and international law.