Hans-Hermann Hoppe's case for a privatized social order:
http://www.lewrockwell.com/hoppe/hoppe26.1.html

Last and most importantly, a system of competing protection agencies would have a two-fold impact on the development of law. On the one hand, it would allow for greater variability of law. Rather than imposing a uniform set of standards onto everyone (as under statist conditions), protection agencies could compete against each other not just via price but also through product differentiation. There could exist side by side, for instance, Catholic protection agencies or insurers applying Canon law, Jewish agencies applying Mosaic law, Muslim agencies applying Islamic law, and agencies applying secular law of one variety or another, all of them sustained by a voluntarily paying clientele. Consumers could choose the law applied to them and their property. No one would have to live under "foreign" law.