Geopolitics (from Greek γῆ ge "earth, land" and πολιτική politikē "politics") is the study of the effects of geography (human and physical) on international politics and international relations. Geopolitics is a method of studying foreign policy to understand, explain and predict international political behavior through geographical variables. These include area studies, climate, topography, demography, natural resources, and applied science of the region being evaluated.

Geopolitics focuses on political power in relation to geographic space. In particular, territorial waters and land territory in correlation with diplomatic history. Academically, geopolitics analyses history and social science with reference to geography in relation to politics. Outside of academia, geopolitical prognosis is offered by a variety of groups including non-profit groups as well as by for-profit private institutions (such as brokerage houses and consulting companies).Topics of geopolitics include relations between the interests of international political actors, interests focused to an area, space, geographical element or ways, relations which create a geopolitical system. "Critical geopolitics" deconstructs classical geopolitical theories, by showing their political/ideological functions for great powers during and after the age of imperialism.