In the Declaration of Independence, the Americans appealed both to natural law and rights on the one hand, and to British constitutionalism on the other,...
The very idea that human beings have individual rights not subject to the whims of an earthly monarch, but subject to the laws of Yahweh, is directly from Moses.
Mosaic Law (of which the Ten Commandments is just a part) is the foundation of Western Civilization. Genesis is the primary focus of the Declaration of Independence, from where our Constitutional rights are derived. “We hold these Truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable rights...” “We, therefore, the Representativers of the united States of America, in General Congress, Assembled, appealing to the Supreme Judge of the World for the Rectitude of our intentions,...”
The Ten Commandments are the foundation of our judicial system.
(P.S. John Locke got most of his stuff from Thomas Hobbes, as did Ayn Rand.)
It also worth to note that all but four of the Founding Fathers whose hand went into the Founding Documents were either theologians, religious scholars, devout Christians or ministers.
One of them saw to it that an American Edition of the Holy Bible be printed from the Congressional Printing Press, and a copy of the original American Edition of the Holy Bible resides in the halls of Congress to this very day.
There also is, located next to the main entrance to the Senate, a small chapel where Congress members and their staff can enter to meditate, pray, and hold Bible study during their free time.
The chapel is not open to the public, but it's clearly distinguishable by it's stainglass window of of a portrait of George Washington genuflecting in prayer.