The Function of Political Boundaries
Boundaries don't just separate land — they create strange geographic situations like countries surrounded by other countries, and extend a state's control out into the ocean itself.
An enclave is a territory entirely surrounded by the territory of a single other state — Lesotho, completely enclosed within South Africa, is the classic example, while remaining a fully sovereign country in its own right. An exclave is the reverse situation: territory that belongs to one state but is physically cut off from that state’s main territory by another country’s land, like Russia’s Kaliningrad, separated from the rest of Russia by Lithuania and Poland.
Governing an exclave is genuinely harder than governing contiguous territory, because supplies, administration, and military support all have to cross through another country’s territory to get there — giving that surrounding country real, ongoing leverage.
Boundaries also extend out to sea. A coastal state can claim an exclusive economic zone — control over fishing, drilling, and other resource rights up to 200 nautical miles offshore — without claiming full territorial sovereignty over that water. When two neighboring countries’ EEZ claims overlap, the result is a maritime boundary dispute, since both states can have a legitimate claim under the same rule. The EEZ is a useful reminder that a state’s control over space isn’t all-or-nothing — it exists in degrees, from full sovereignty down to narrower resource rights.