Ouch folks - maybe a book on Native Confederations would be valuable - the tribes DID have much contact with each other - in the East especially - part of our Constitution is copied from the the Confederacies of the Native Tribes.
A couple of confederacies include:
The Iroquois, were an association with a large tribal alliance. The Iroquois Constitution, called the Great Law of Peace, were the most powerful federation in the northeast that included the Mohawk, Oneida, Onondaga, Cayuga, Seneca, and Tuscarora..
The Tecumseh's Confederacy that included 1000s of warriors in what is now the Ohio River Valley
The Cherokee Nation included Chickasaw, Choctaw, Muscogee Creeks, Seminole - within the Muscogee were the Coushatta and the Alabama-Coushatta of Texas.
The Blackfoot Nation is a confederation of several tribes, including the South Piegan, the Blood or Kainai, the North Piegan, and the North Blackfoot or Siksika.
The most ancient confederacy of the Shawnee, whose history go back to the mound dwellers are part of the Algonquians who concluded hundreds of peace treaties with the tribal leaders Metacomet, Cornstalk, Tecumseh and Pontiac. Some of the tribes that were represented with peace treaties and part of the Confederacy were the Delaware, the Mingo, Illiniwek, Kickapoo, Menominee, Miami, Sac and Fox
The Apache tribe consists of: the Western Apache, Chiricahua, Mescalero, Jicarilla, Lipan and Kiowa
The Pawnee, one of the largest and most prominent Plains tribes, numbered over ten thousand during the period of early contact with Europeans. There were four divisions, designated as bands. Northernmost were the Skiris, who spoke a distinct dialect of Pawnee, a Caddoan language. South of the Platte to Kansas lived the Chawis, the Kitkahahkis, and the Pitahawiratas.
The Cheyenne and Arapaho Tribes were united and friends to the Lokato (Sioux) and they were part of a 7 nation Confederacy.
This goes on and on - so that there were few to none small tribes unassociated with a formal Confederacy with laws that were not written till the 1500s but were known and kept alliances, trading and wars legal among Native Tribes. This is no different than today we know of the Tribes and their loyalty in places like Iraq with the Sunni and Shea - although religious based they use tribal law and Sherra law.
Long before the white man showed up, using long distance runners, among the western tribes some of these runners had routes into the Yucatan in Mexico. Trading and communication was far more sophisticated than our White history leads us to believe - like most history the victors write the history from their perspective often demonizing the enemy.
The framers of the Constitution, like most colonists, were keenly aware and persuaded by Indian images of liberty. During the bi-centennial year of The Constitution of the United States, a number of books were written concerning the origin of our revered document. The "The Genius of the People," explains that after the many weeks of debate a committee led in part by South Carolina's John Rutledge, sat to discuss the wide range of disputes amongst the delegates. Rutledge had served earlier, along with Ben Franklin and others, at the Stamp Act Congress.
This Committee of Detail was having trouble deciding just how to formalize the many items of discussion into one document that would satisfy one and all. Rutledge proposed they model the new government into something along the lines of the Iroquois League of Nations, which had been functioning as a democratic government for hundreds of years, and which he had observed in Albany.
While there were many models from ancient and modern histories in Europe and the Middle East, only the Iroquois system seemed to meet most of the demands supported by the many parties to the debates. The Iroquois had a Constitution which began: "We the people, to form a union..." The Constitution of the Iroquois Nation called the Great Binding Law, Gayanashagowa contains 117 articles.
I know all that is beside the point to this book but I am always deflated when I hear how we do not know the history of a people who we have stripped of their land, language, culture and even taken away from parents their children to educate them to be white.