Thomas Hobbes,
De Cive — Chapter VIII: Of the Rights of Lords over their Servant
“ II. Every one that is taken in the War, and hath his life spar'd him, is not suppos'd to have Contracted with his Lord; for every one is not trusted with so much of his naturall liberty, as to be able, if he desir'd it, either to flie away, or quit his service, or contrive any mischief to his Lord. And these serve indeed but within Prisons, or bound within Irons, and therefore they were call'd not by the common name of Servant onely, but by the peculiar name of Slave, even as now at this day un serviteur, and un serf or un esclave have diverse significations. ”
