How does studying the histories of these three parts of the world help you to understand their later contributions to American history?

Essay Question:
This course began with an exploration of African, Native American, and European cultures. Why is it important for courses in U.S. history to begin here? How does studying the histories of these three parts of the world help you to understand their later contributions to American history?Considerations: origins of humans in Africa
the rich cultures of Africa and early North America
religious, political, and economic changes in early modern Europe the long-term impact of the Columbian Exchange