Anarchist law is a hypothetical body of norms regarding behavior and decision-making that might be operative in an anarchist community. The term is used in a series of ongoing debates within the various branches of anarchist theory regarding if and how norms of individual and/or collective behavior, decision-making and actions should be created and enforced. Although many anarchists would consider "anarchist law" simply synonymous with natural law, others contend law in anarchy would have additional, unique elements. Over the course of the last two hundred years as anarchism has grown and evolved to include diverse strains, there have been different conceptions of "anarchist law" produced and discussed, or used in practice by anarchist networks such as Peoples' Global Action or Indymedia.
The most fundamental maxim of many anarchist tendencies is that no individual has the right to coerce another individual, and that everyone has the right to defend his or her self against coercion (the non-aggression principle or zero aggression principle). This basic principle forms the basis of all anarchist law, and indeed of virtually all anarchist theory. "It is best summed up by the maxim 'do unto others as you would have them do unto you'" (quoting Kropotkin), with the additional provision that if others try to do things to you that violate your rights you have the right to stop them. In short, anarchist philosophy includes the "golden rule", but typically does not include "turning the other cheek" (with the exception of Christian anarchism and other nonviolent/pacifistic movements).
Since the principle of non-coercion makes hierarchical State structures unfeasible, anarchist communities must find an alternative basis for setting the rules of engagement within a collectivity. Accordingly, virtually all anarchist legal models begin with the assumption that whatever rules are set in place must be freely agreed to by the entirety of the community that is to be governed by them in a setting free from coercion or intimidation. Such freely given consent constitutes a social contract, though the exact nature of such contracts is a matter of heated debate.