I find myself pointing to more production and higher standards of living as arguments for free markets.  While these are important and valid points, they are secondary to moral issues.  A free market is needed for a free mind.

If you believe in self ownership – that you own yourself, not another person, not a group of persons – then you realize that a free market must be the only moral option.  The biggest problem people have with this is that they want to ‘be their own person’ without the responsibility.  Self-ownership means responsibility for that self.

This shouldn’t be difficult to defend. If you don’t own yourself, who does? If you’re not responsible for yourself, who is?