Antony
Graduate Poster
But that doesn't mean that if people see the government executing criminals, that the citizenry will follow suit. First, such private killings are illegal, and second, the government does a lot of things without the populace being emboldened to do the same things. Print money, levy taxes, etc.
I'm not talking about the citizenry and the populace in general - which is why I used the expression "violent types". State executions devalue human life, and give an excuse to the criminally-minded to commit murder. They don't rationalise judicial killings by saying to themselves, "he had due process and deserved it"; they think "I want this person dead; the state kills people; there's no reason why I shouldn't."
I see no evidence that the double standard of executions means that such a message is actually being sent, so that simply doesn't strike me as an effective argument against the DP, compared to others that have been raised.
I don't know what sort of evidence you would accept. There is certainly no evidence of any deterrent effect of the death penalty, which depends on projecting a way of thinking onto potential murderers: "I won't kill because I'm scared of being executed."
What I do see is a correlation between the death penalty and higher murder rates; I'm just suggesting what looks to me like a likely explanation of why this should be. It's just a matter of getting inside the head of someone in a situation where they are tempted to commit murder.