The death penalty fulfills a preventive function, but it is also very clearly a form of revenge. It is an especially severe form of punishment because it is so final. The human life is ended and the executed person is deprived of the opportunity to change, to restore the harm done or compensate for it.
My revenge is fraternity! No more frontiers! The Rhine for everyone! Let us be the same Republic, let us be the United States of Europe, let us be the continental federation, let us be European liberty, let us be universal peace!
Men ought either to be well treated or crushed, because they can avenge themselves of lighter injuries, of more serious ones they cannot; therefore the injury that is to be done to a man ought to be of such a kind that one does not stand in fear of revenge.
That space the Evil One abstracted stood From his own evil, and for the time remained Stupidly good, of enmity disarmed, Of guile, of hate, of envy, of revenge .
Teller contended, not implausibly, that hydrogen bombs keep the peace, or at least prevent thermonuclear war, because the consequences of warfare between nuclear powers are now too dangerous. We haven't had a nuclear war yet, have we? But all such arguments assume that the nuclear-armed nations are and always will be, without exception, rational actors, and that bouts of anger and revenge and madness will never overtake their leaders (or military and secret police officers in charge of nuclear weapons). In the century of Hitler and Stalin, this seems ingenuous.
Tell a scoundrel, three or four times a day, that he is the pink of probity, and you make him at least the perfection of "respectability" in good earnest. On the other hand, accuse an honorable man, too petinaciously, of being a villain, and you fill him with a perverse ambition to show you that you are not altogether in the wrong.
I'm a fighter. I believe in the eye-for-an-eye business. I'm no cheek turner. I got no respect for a man who won't hit back. You kill my dog, you better hide your cat.
Revenge in the hands of your enemies is a loaded gun. You can beg them for mercy, wave the white flag of surrender, but the only true elixir for the vitriol they bestow is a measure of hatred dispensed of your own.
I don't think you should support the death penalty to seek revenge. I don't think that's right. I think the reason to support the death penalty is because it saves other people's lives.