Morality by the Numbers

Responses to my post from yesterday seemed nearly unified in agreeing that it is immoral to kill someone who has a 5% likelihood of someday killing you in the future. Most people agreed that in order for self defense to be a moral act you need the danger to be more immediate. And if you use the 5% threshold of danger you can justify killing just about anyone now so they won't accidentally drive over you in their car later.

Most of you agree that if someone pulls a gun and says, "I'm going to sho