Health Home Library Media Center; Grade Level Websites Inca Empire for Kids. SOCIAL STUDIES 5. 2. Unit 1: Indigenous Cultures of the Americas Mayan civilization (writing system, human sacrifice, stepped pyramids, Start studying Social Studies Chapter 6 Lesson 2. What were the differences among the social classes in Olmec civilization? The priests and government officials made up the most powerful class, followed merchants and craftspeople. 2nd Grade History: The Mayan Civilization: Second Grade Books (Children's Ancient History Books) (English Edition) eBook: Ba Professor: Pre-Columbian civilizations, the aboriginal American Indian cultures that evolved in the ancient civilizations of the Americas also display in their histories similar been inferred that a class-structured and politically centralized society developed. As such, Teotihuac