describe the origin and development of the major Indian cultures in Americas.

The first Indians in the America's were Asian. They migrated across a land bridge known as the Bering Isthmus. They spread across America, where they developed into tribes such as the Incas, Mayans, and Aztecs. They were hunter-gatherers, eventhough at one point they were hunters. They respected the land and used all the resources. They didn't carelessly destroy it.