condition of consent is that the rules be consistent with underlying principles of justice and the protection of natural and social rights, and have procedures for effective protection of those rights (or liberties). This has also been discussed by O.A. Brownson, who argued that, in a sense, three "constitutions" are involved: first, the constitution of nature that includes all of what the Founders called "natural law"; second, the constitution of society, an unwritten and commonly understood set of rules for the society formed by a social contract before it establishes a government, by which it does establish the third, a constitution of government. To consent, a necessary condition is that the rules be constitutional in that sense. Tacit consent The theory of an implicit social contract holds that by remaining in the territory controlled by some society, which usually has a government, people give consent to join that society and be governed by its government if any. This consent is what gives legitimacy to such a government. Other writers have argued that consent to join the society is not necessarily consent to its government. For that, the government must be set up according to a constitution of government that is consistent with the superior unwritten constitutions of nature and society. Explicit consent The theory of an implicit social contract also goes under the principles of explicit consent. The main difference between tacit consent and explicit consent is that explicit consent is meant to leave no room for misinterpretation. Moreover, you should directly state what it is that you want and the person has to respond in a concise manner that either confirms or denies the proposition. Contracts must be consensual According to the will theory of contract, a contract is not presumed valid unless all parties voluntarily agree to it, either tacitly or explicitly, without coercion. Lysander Spooner, a 19th-century lawyer who argued before the United States Supreme Court and staunch supporter of a right of contract between individuals, argued in his essay No Treason that a supposed social contract cannot be used to justify governmental actions such as taxation because government will initiate force against anyone who does not wish to enter into such a contract. As a result, he maintains that such an agreement is not voluntary and therefore cannot be considered a legitimate contract at all. An abolitionist, he made similar arguments about the unconstitutionality of slavery