What were the social, cultural, religious, and economic characteristics of American Civilization? What was Ancient America's (Mesoamerica and South America) greatest single contribution to world culture?

What were the social, cultural, religious, and economic characteristics of American Civilization? What was Ancient America’s (Mesoamerica and South America) greatest single contribution to world culture?

What were the social, cultural, religious, and economic characteristics of American Civilization? What was Ancient America’s (Mesoamerica and South America) greatest single contribution to world culture?