This document provides an overview of the history and cultures of indigenous peoples in North and South America prior to European contact. It describes how the first humans arrived in America over 22,000 years ago across a land bridge between Asia and Alaska. It then discusses the development of hunting and gathering societies, the emergence of agriculture around 10,000 years ago, and the rise of complex civilizations like the Olmec, Maya, Aztec, and Inca between 3,000-1,200 years ago. The document also profiles the diverse native societies that existed in North America around 1492, including groups in California, the Northwest Coast, Southwest, and Eastern Woodlands.