> If achieving a free market requires a complete upheaval of all of our governments and laws, then the idea isn't very useful.

The idea is extremely useful: act consensual to others. There is no better basis of a social system than this. Having conversations like the one were having now is really all we need. To force the ideas on others in anyway, especially through democracy, would be hypocritical.

A social system based on utility, which is basically all social systems we've had throughout history, is violent, aggressive and dangerous. No wonder history repeats itself.