Panarchism
Panarchism is a political philosophy advocating the peaceful co-existence of all political systems, where each individual may voluntary adhere to the system of his choice, free to join and leave the jurisdiction of the governments he sees fit (modulo contractual obligations). International law would be used to settle possible conflicts between individuals having chosen different systems of government.
The word panarchy was invented and the concept proposed by Paul Emile de Puydt in 1860.
Anarcho-capitalists argue that panarchism is an alternative way of presenting the same system as they advocate. Yet another way of considering the same system is voluntarism, whereby people are related by voluntary contractual relations and natural law, excluding any forceful political compulsion. But some critics argue that it is self-contradictory as some poltical systems reject peaceful co-existence.