Here are a few, though, for the curious:
Those who believe in the dissuasive value of death penalty are unaware of the human truth. The criminal passion is not the more stopped by the fear of death than other passions which are themselves noble.
— Robert Badinter, extrait d'un discours à l’Assemblée nationale - 17 Septembre 1981
So what is capital punishment but the most deliberate of murders, to which no infamy, however calculated, could be compared to?
— Albert Camus
Death penalty is an immoral punishment, or at the very least useless, because it make us used to the performance of torments, and because it repairs nothing; as, sadly, the death of the murderer does not give back life to the victim.
— François Eugène Vidocq.
What does Law says? Thou shalt not kill! How does she says it? By Killing!
— Victor Hugo, Les misérables
I looked into death penalty by both of its sides, direct action, indirect action. What remains of it? Only a horrible and useless thing, only a bloody assault called crime when the individual carries it, and called justice (oh pain!) when society perpetrates it. Know this, whoever you are, lawmakers or judges, to the eyes of God, to the eyes of conscience, what is crime for the individual is crime for society.
— Victor Hugo, discours devant l’Assemblée constituante, 1848
As long as death penalty exists, we will feel cold when stepping into a Court of Appeal, enshrouded in night.
— Victor Hugo
Death penalty is opposite to what mankind, since two thousand years, has thought of higher and dreams of more noble.
— Jean Jaurès
To take a life when a life has been lost is revenge, not justice.
— Desmond Tutu
Assassination on the scaffold is the worst form of assassination because there it is invested with the approval of the society. Murder and capital punishment are not opposites that cancel one another, but similars that breed their own kind.
— George Bernard Shaw