First, we Native Americans certainly did understand how purchasing land worked. The problem is that settlers invaded our lands with their systems of commerce and forced it on us.

Second, please refer to some of my previous work to have your question answered:

• History of reservations, detailing how we secured our homelands through treaties: What is the history of Native American Reservations in America? How did they come about? What status were they given in regards to autonony? How much oversight does the Federal Government get?

• An example of how the federal government literally stole land: Why is the European colonisation of North America seen as so morally wrong?

Let me rephrase that Was any land bought from american Indians or was all of it stolen