&gt; The vast majority of people have never and will never murder.<p>Like I said, modern society has instilled feelings of guilt and negative consequences with our comparatively well-developed ethical and justice systems, generally leading to situations where the risk of getting caught murdering someone outweighs the benefits of killing them (go to jail, hell, etc). But flip the risk analysis (eg, what this article is about), <i>et voilà</i>, no problem.