The American foundational framework of ideas around which the budding conflicts would be resolved were not American. In the Declaration of Independence, for example, Thomas Jefferson borrowed quite liberally from John Locke’s Two Treatises of Government, from which also are derived many ideas in the Constitution, including separation of church and state.
In this groundbreaking work, the 17th-century Enlightenment philosopher, also deemed the father of English and U.S. liberalism, proposed the notion of the social contract. In his words: “That which begins and actually constitutes any political society is nothing but the consent of any number of freemen capable of a majority to unite and incorporate into such a society. And this is that, and that only, which did or could give beginning to any lawful government in the world.”
In an age of absolute monarchy, in which a French king boasted that “L’etat c’est moi” (I am the State) and English kings still claimed power over Parliament, this was a revolutionary idea. It was extended by a 19th century thinker, John Stuart Mill, who conceived of liberty as the absence of restraint from government or others to develop one’s own unique abilities and capacities. In On Liberty, penned in 1859, he stated “the only freedom which deserves the name, is that of pursuing our own good in our own way.”