This document discusses the history and current state of American foreign policy and national security. It covers the evolution of US foreign policy from isolationism to global involvement during World War I and II. Key aspects of foreign policy discussed include instruments of policy, actors on the global stage, and policymakers both past and present. The Cold War era and challenges of nuclear proliferation, terrorism, and international economic interdependence are summarized as shaping the modern global agenda and US approach to national security.