not at all monopolistic privileges; they are free associations of individuals pooling their capital. On the purely free market, those men would simply announce to their creditors that their liability is limited to the capital specifically invested in the corporation". However, corporations created in this way would not be able to replicate the limit on liabilities arising non-contractually such as liability in tort for environmental disasters or personal injury which corporations currently enjoy. Rothbard acknowledges that "limited liability for torts is the illegitimate conferring of a special privilege". There are limits to the right to contract under some interpretations of anarcho-capitalism. Rothbard believes that the right to contract is based in inalienable rights and because of this any contract that implicitly violates those rights can be voided at will, preventing a person from permanently selling himself or herself into unindentured slavery. However, Rothbard justifies the practice of child selling. Other interpretations conclude that banning such contracts would in itself be an unacceptably invasive interference in the right to contract. Included in the right of contract is "the right to contract oneself out for employment by others". While anarchists criticize wage labour describing it as wage slavery, anarcho-capitalists view it as a consensual contract. Some anarcho-capitalists prefer to see self-employment prevail over wage labor. David D. Friedman has expressed a preference for a society where "almost everyone is self-employed" and "instead of corporations there are large groups of entrepreneurs related by trade, not authority. Each sells not his time, but what his time produces". Law and order and the use of violence Different anarcho-capitalists propose different forms of anarcho-capitalism and one area of disagreement is in the area of law. In The Market for Liberty, Morris and Linda Tannehill object to any statutory law whatsoever. They argue that all one has to do is ask if one is aggressing against another in order to decide if an act is right or wrong. However, while also supporting a on force and fraud, Rothbard supports the establishment of a mutually agreed-upon centralized libertarian legal code which private courts would pledge to follow, as he presumes a high degree of convergence amongst individuals about what constitutes natural justice. Unlike both the Tannehills and Rothbard who see an ideological commonality of ethics and morality as a requirement, David D. Friedman proposes that "the systems of law will be produced for profit on the open market,