Pirates Killed, Captain Saved -- w00t!!

There is a tradition received from Roman law into the early modern yet Christian-influenced tradition of Grotuis and Vattel, a tradition towards which we should only with the greatest caution indulge a sense of superiority, that regarded pirates -- because of the self-expulsion from the civilized human community that knows the rule of law -- as latrunculi (a contemptuous diminutive of "thieves"), hostis humani generis (enemies of the human race), and eligible for summary execution.

The sagacious Prof. Mackubin Owens explains here.