This document summarizes a lecture on Western political thought and foreign policy. It discusses Upton Sinclair and muckrakers, how the masses perceive political parties, causes of war, America's biological weapons program, and the role of public opinion and legislatures in foreign policymaking. The lecture covers nationalism, ethnicity, religion, culture and natural resources as causes of war. It also describes America's secret biological weapons research program and testing on human subjects during the Cold War, and the program's later scrutiny and end under international agreements.