History of the Peloponnesian War

Indeed, they could not unite for this expedition till they had gained increased familiarity with the sea. 4And the first person known to us by tradition as having established a navy is Minos. He made himself master of what is now called the Hellenic sea, and ruled over the Cyclades, into most of which he sent the first colonies, expelling the Carians and appointing his own sons governors; and thus did his best to put down piracy in those waters, a necessary step to secure the revenues for his own use.

5For in early times the Hellenes and the barbarians of the coast and islands, as communication by sea became more common, were tempted to turn pirates, under the conduct of their most powerful men; the motives being to serve their own cupidity and to support the needy. They would fall upon a town unprotected by walls, and consisting of a mere collection of villages, and would plunder it; indeed, this came to be the main source of their livelihood, no disgrace being yet attached to such an achievement, but even some glory. An illustration of this is furnished by the honour with which some of the inhabitants of the continent still regard a successful marauder, and by the question we find the old poets everywhere representing the people as asking of voyagers--"Are they pirates?"--as if those who are asked the question would have no idea of disclaiming the imputation, or their interrogators of reproaching them for it. The same rapine prevailed also by land.