Liberalism is a perspective in International Relations that emphasizes the role of international institutions, cooperation, and interdependence in shaping state behavior. Unlike realism, which views the international system as anarchic, liberals believe that states can work together to achieve common goals and address global challenges. They argue that economic and political interdependence can lead to peace, stability, and prosperity, and that international institutions, such as the United Nations and international trade organizations, can play a key role in promoting cooperation and resolving conflicts.

Source: Keohane, R. O., & Nye, J. S. (1977). Power and interdependence: world politics in transition. Boston: Little, Brown.