The constitution is a contract between the states towards the construction of a fictional semi-sovereign, the federal government, much like treaties between countries. None of us are parties to that contract. However, society is based on the idea of a social contract, and it has been long held that the merit of government is in government’s duty to protect its citizens (the “Law of Nations” book, referenced in the constitution, and many works preceding it), and, the particular protections the US government is presenting are present in the US Constitution. And so, regardless of whether we are parties to that contract, the merit of the US government relies upon the protection of the rights presented as being protected.