A. Realpolitik
B. Isolationism
C. Sovereignty
D. None of these
Explanation:
The doctrine of sovereignty emphasizes the principle that states have the right to govern themselves without external interference in their internal affairs. This concept is a cornerstone of international law and the modern state system, as outlined in the United Nations Charter.
Realpolitik (A) refers to politics based on practical and pragmatic considerations rather than ideological or moral principles.
Isolationism (B) is a policy of avoiding involvement in international affairs, but it does not specifically focus on non-interference in other states’ internal matters.
None of these (D) is incorrect because sovereignty directly addresses the principle of non-interference.
The correct answer to the question: "Which doctrine focuses on non-interference in the internal affairs of other states?" is "Sovereignty".
