The sea is free: it belongs to no one, and to all.
Mare liberum est: nullius enim mare est, et omnium mare est.

Philosophers
Hugo Grotius
Dutch jurist (1583-1645), father of international law. His De Jure Belli ac Pacis (1625) grounded the law of war and peace in natural law. Sentenced to life imprisonment in 1619, he escaped in a book chest.
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Source: Mare Liberum (1609), 第5章Verified