Well, if the death penalty were an effective deterent to crime Texas would be the most crime free state in the union... which it isn't. I'm not saying that people who commit certain crimes don't deserve to die, surely some DO. But as Gandalf said to Frodo; "Many who live deserve death, some who die deserve life. Can YOU give it to them Frodo? Do not be too eager to deal out death and judgement, even the very wise cannot see all ends."
Another thought; DNA evidence has in the recent past proven that a fair number of people, some on death row, are innocent of the crimes for which they were convicted.
There are some societies where crime is very low. I believe many of them DO have a death penalty. However, I believe that the possibility of death has very little to do with the low crime rate. The key to the low rates is the fact that the socoeties are VERY homogenous. That is, they value conformity highly. In America we value freedom and independence, even rebelion... It is harder to get folks to agree on right and wrong in such a free society. I think there are ways to deter crime even so... but perhaps our greatest minds have not thought long enough about it.
If the death penalty actually detered violent crime it might be worth it even though some who were innocent would surely be executed along with the guilty. It is a simple solution, really. And it satisfies peoples lust for vengence. But it doesn't affect crime statistics at all.
~Witch