"International relations theory" encompasses various frameworks used to analyze the interactions among global actors, such as states, international organizations, and non-state entities. Major theories include realism, which focuses on power dynamics; liberalism, emphasizing cooperation and institutions; and constructivism, highlighting social constructs in international politics. These theories help scholars and policymakers understand complex global challenges, guide diplomatic strategies, and inform decisions about conflict resolution, trade agreements, and human rights advocacy on the international stage.