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Thalassocracy

/ˌθæləˈsɒkrəsi/noun

A state whose power rests on control of the sea rather than on territory.

The Greek roots

θάλασσα
thálassa
sea
+
κράτος
krátos
power, rule

Literally: sea power

The story of the word

Thucydides opens his history by claiming Minos was the first man to hold a navy and clear the sea of pirates, and archaeology borrowed that sentence as the Minoan thalassocracy, a phrase now used more cautiously than it was in 1900. English took the word in the nineteenth century for Athens after 478 BC, for Venice, and eventually for Britain. Θάλασσα has no Indo-European relatives worth the name and is probably a word the Greeks found already in use when they arrived.

How it travelled
Ancient Greek → English
First recorded
19th century

Same family

thalassemiademocracyaristocracybureaucracy

In a sentence

Their empire was a thalassocracy: a string of harbours and no interior worth defending.

A thalassocracy lives or dies by its dockyards.

Built on the same root

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