And this just in from an alternate moral universe: another reason to not kill a human: asset depreciation.

Actually when you think about it -- the punitive nature of criminal law, and the "punishing" price correction of asset depreciation -- kind of in the same boat incentive wise. The sad thing is that human society seems to need punishments to try to encourage people to not kill people, rather than not killing people because of an intimate appreciation of the inherent value of every human life.