From my (for now anonymous) Libertarian Economic Guy:

Jonah,
I can’t help but point out that the “businesses” most likely to have
“CEOs” murder each other are those businesses that the state has
declared illegal: drug lords, prostitution ring pimps, rum runners
during alcohol prohibition. In other words, “organized crime.” Where
people do not have recourse to the law to settle their disputes, they
will work outside the law. The Fortune 500 have lawyers and courts.
Drug lords do not.
For me, this is yet another reason to legalize all this stuff and let
disputes get settled in civil and non-violent ways. Market capitalism
and the rule of law civilize us in precisely these ways.

Me: I saw this coming from miles away. Yes, yes, making drugs legal would give drug dealers access to courts and make them less violent. It would do the same for pimps, too, if we made prostitution legal. Indeed, there’s no illegal activity that wouldn’t become less violent if we legalized it. That’s always a good argument for legalizing something, but in many cases it is not a sufficient argument.