Every malefactor, by attacking the social rights, becomes, by his crimes, a rebel and a traitor to his country; by violating its laws he ceases to be a member of it; he even makes war upon it. In such a case the preservation of the state is inconsistent with his own, and one or the other must perish; in putting the guilty to death we slay not so much the citizen as the enemy. The right to punish has been shifted from the vengeance of the sovereign to the defence of society
Michel Foucault, Discipline & Punish (1977), 90.