You said: Let's start with the obvious - one is reversible, one isn't.
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How can one reverse a wrongful imprisonment? Can you return that time to the person? If you have lost part of your life, can the state return it to you? No. Yet we don't hear many arguments about ending imprisonment. The "one innocent life" argument sounds compelling, but what about innocent lives lost due to the failure to do justice? I agree there are no perfect solutions, but the country has spoken, through its people.
Very true - but I think there is a definitive shift occurring. I see people recognizing the inherent weaknesses in our justice system and taking steps to correct them. You see CCW laws being passed nearly everywhere. Even better, right to defend laws are starting to come into play.
Limit the power of the state and increase the rights of the citizens to defend.
I think the people will speak again and this time it will be against the death penalty.