I would hold the maxim that killing is wrong when it is not absolutely necessary. A stone-age tribe does not necessarily have the calories just to keep someone

I would hold the maxim that killing is wrong when it is not absolutely necessary. A stone-age tribe does not necessarily have the calories just to keep someone imprisoned. A modern society most certainly does. There is no "need" for the government to force people sully their consciences by partaking in an institutional murder.