The Court also found that the death penalty "comports with the basic concept of human dignity at the core of the Amendment". The death penalty serves two principal social purposes—retribution and deterrence." In part, capital punishment is an expression of society's moral outrage at particularly offensive conduct". But this outrage must be expressed in an ordered fashion, for America is a society of laws. Retribution is consistent with human dignity, because society believes that "certain crimes are themselves so grievous an affront to humanity that the only adequate response may be the penalty of death". And although it is difficult to determine statistically how much crime the death penalty actually deters, the Court found that in 1976 there was "no convincing empirical evidence" supporting either the view that the death penalty is an effective deterrent to crime or the opposite view. Still, the Court could not completely discount the possibility that for certain "carefully contemplated murderers", "the possible penalty of death may well enter into the cold calculus that precedes the decision to act".