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Wellsprings
history

Thalassocracy (Sea Power)

θαλασσοκρατία

Command of the sea — not the land — as the true engine of empire, wealth, and strategic reach.

Thalassocracy means 'rule of the sea': the idea that a power controlling the sea-lanes can project force, extract tribute, and outlast land-based rivals. Herodotus uses the term, and Thucydides (late 5th c. BCE) traces Athens' empire directly to its fleet and treasury, making naval supremacy a distinct category of explanation. The notion shaped Greek analysis of Athenian power and echoes through later strategic thought on maritime empire.

Where this idea shows up

5 Greek sources

Where to read it