Instead of trying to impose "the right laws" from the top down why not be the first society to try poly-centric market based law.
Oh it's been tried all right. Several times in fact. It always ends in blood, tears and shit sticking to the wall.
Please provide us with some more detail. Specifically where and when are you talking about. You said several times so please be sure to site at least 3 examples.
http://en.wikipedia.org/wiki/Freetown_Christiania
http://en.wikipedia.org/wiki/Operation_Atlantis
http://en.wikipedia.org/wiki/Republic_of_Minerva
http://chiefacoins.com/Database/Micro-Nations/Freedonia.htm