This article outlines a general history of the intellectual origins and development of geopolitical thought. It provides categories for assessing contemporary expressions of this phenomenon, and then discusses the applicability of these tools to the Baltic Sea region. The article focuses on eliciting and juxtaposing contrasts between the three classical bodies of literature that evolved largely in parallel, and ends up briefly commenting on a fourth, partly “critical” approach. The main takeaway is that considering all four geopolitical approaches before applying any of them to the Baltic Sea realm encourages analysts to embrace a more holistic and dynamic viewpoint than each of the alternatives individually can offer. Such a conceptualization promises to forge analytical linkages between a series of relevant, geographically contingent circumstances including resources, arenas and communities that represent prerequisites and opportunities incrisis, conflict, or war.