The document discusses various definitions and theories of international relations. It notes that IR can refer to diplomatic relations between states, cross-border economic and social transactions, or the study of globalization. There is no single agreed upon definition because the subject matter is complex and definitions reflect scholars' interests. Common elements in definitions include state sovereignty and the anarchic international system. Theories help explain phenomena like war and provide normative guidance. The scope of IR includes international political economy, organizations, foreign policy, and conflict studies.