Which of the following is NOT considered a main theory of international relations?

The correct answer is Determinism because it is not recognized as a main theory of international relations in the same way that Realism, Constructivism, and Liberalism are.

Realism focuses on the concept of power and the anarchic nature of the international system, asserting that states act in their own self-interest and prioritize survival. Liberalism emphasizes cooperation, interdependence, and the role of international institutions and norms in fostering peace and collaboration among states. Constructivism introduces a perspective that highlights the significance of social structures, identities, and norms in shaping state behavior and the international system.

Determinism, on the other hand, generally refers to a philosophical viewpoint where events are determined by previously existing causes, often implying a lack of agency and flexibility. This framework is not aligned with the active, strategic interactions that characterize the theories of international relations. Therefore, while Realism, Constructivism, and Liberalism form essential frameworks for analyzing international affairs, Determinism does not fit within this context.