Revisiting Insularity and Expansion: A Theory Note

What is the relationship between insularity—a state’s separation from other states via large bodies of water—and expansion? The received wisdom, prominent in (though not exclusive to) realist theories, holds that insularity constrains expansion by making conquest difficult. We contend, contrast, this wisdom faces important limits. Focusing on U.S. means short conquest, we interrogate underlying theoretical logics to demonstrate insular powers enjoy two distinct advantages when it comes expansion. First, translates into a “freedom roam”: because are less threatened at home, they can project more power and influence abroad. Second, “sterilizes” power, which explains why seen as attractive security providers do see counterbalancing against them. On net, existing scholarship correct argue impedes great powers. Still, has missed ways abets spheres One consequence an under-appreciation for role geography writ particular shaping contemporary behavior.