Rimland

thumb|Map of world with Rimland and Heartland's theories

The Rimland is a concept championed in the early 20th century by Nicholas John Spykman, professor of international relations at Yale University. To him, geopolitics is the planning of the security policy of a country in terms of its geographical factors. He described the maritime fringe of a country or continent; in particular the densely populated western, southern, and eastern edges of the Eurasian continent.