This document outlines the development of geopolitics theory over 5 stages: 1) The late 19th/early 20th century race for imperial hegemony by theorists like Mackinder, Mahan, and Ratzel; 2) German Geopolitik in the 1920s-30s led by Haushofer to justify German expansionism; 3) American geopolitics in the post-WW2 era emphasizing containment of the Soviet Union; 4) The Cold War period saw both state-centric theories focused on balance of power and universalist theories examining global economic and environmental systems; 5) Post-Cold War theories debated American hegemony, globalization, and clashes of civilizations.