How did European trade with the Native Americans impact their ways of life?

In Chapter 13, the author addresses the issue of land as a source of constant talks and conflict. Land speculators regularly cheated Indians out of land, and Europeans encouraged Indian debt, so that the Indians would be forced to trade land in exchange for debt forgiveness. On the subject of trade, Indians became increasingly dependent on European manufactured goods such as guns and clothes, forgetting their own self-sustaining ways.