That is easy, JLM. There is empirical evidence for it. USA is the only developed country to have death penalty (with the exception of Japan) and it has the highest murder rate than any developed country.
Even within USA, the states which have death penalty have higher murder rates than states without death penalty.
So there is plenty of empirical evidence to think that death penalty contributes to murder rate. Now, is there any reason to link the two? There most certainly is. Death penalty cheapens the value of life; it coarsens the society towards life. If government itself kills its citizens, that tells the people that life is not all that valuable.
If something is declared as having a low value by the government, it is logical, reasonable to suppose that people will imitate the government.
So there is empirical and logical evidence to tell us that death penalty may indeed lead to increase in crime rate.
how about a breakdown of all of the states who 'do' have
the death penalty and those who 'do not'.
What are the differences of 'types' of people living within
those states, and where are they located.
I'm assuming without knowing that texas and florida have
the death penalty, and washington state and all of the
northern 'border' states do not. Just guessing, would like
to know which ones do and don't, and that california does
not, and new york does not, tell me if I'm wrong on any of
them. I would guess that many of the 'fundamental conservative christian' states have the death penalty.
Interesting subject. I'm not really sure where I stand,
as I can think of reason 'for' and reasons 'not to'.