William J. Brennan,
Furman v. Georgia — Concurring Opinion
“ As one 19th century proponent of punishing criminals by death declared,When a man is hung, there is an end of our relations with him. His execution is a way of saying, "You are not fit for this world, take your chance elsewhere." [39] [p291] In comparison to all other punishments today, then, the deliberate extinguishment of human life by the State is uniquely degrading to human dignity. I would not hesitate to hold, on that ground alone, that death is today a "cruel and unusual" punishment, were it not that death is a punishment of longstanding usage and acceptance in this country. ”
