To complete the picture:
The United States today admits that its Constitution is an adaptation of Native American philosophies. In 1987-8, Congress (in HP #331 and Senate Concurrent Resolution #76) approved a statement praising the Haudenosaunee Six Nations for their political skills and acknowledging America’s debt to them in this regard:
Whereas the original framers of the Constitution, including, most notably, George Washington and Benjamin Franklin, are known to have greatly admired the concepts of the Six Nations of the Iroquois Confederacy; Whereas the confederation of the original Thirteen Colonies into one republic was influenced by the Iroquois Confederacy as were many of the democratic principles which were incorporated into the Constitution itself; Be it resolved by the Senate (the House of Representative concurring) that:
The Congress, on occasion of the two hundredth anniversary of the signing of the United States Constitution, acknowledges the historical debt which this Republic of the United States of America owes to the Iroquois Confederacy and other Indian nations for their demonstration of enlightened, democratic principles of Government and their example of a free association of independent Indian nations.
So there you have it. I've shown that history texts, anthropologists, historians, and even the U.S. Government itself all openly acknowledge that the Constitution was partly inspired by the Law of the Iroquois. Perhaps most interestingly, the founding fathers themselves said so! If this isn't enough to make the point, there's a denial that no litany of historical facts can resolve.