The supreme legal document of a capitalist society is the constitution — a citizen’s protection not only against private criminals but public ones as well. A written constitution objectively defines the nature, scope, and limitations of government powers serving as the individual’s protection against the government.
It is important to note that “the Constitution is a limitation on the government, not on private individuals—that it does not prescribe the conduct of private individuals, only the conduct of the government—that it is not a charter for government power, but a charter of the citizen’s protection against the government.” [1]
[1] Ayn Rand, “The Nature of Government”