The second half of the course is devoted to the study of the first three eras in World History. These units lay a foundation for the future study of World History in high school. Calling on the geography, economics, and civics that they have previously studied, students learn about the earliest humans and explore early migration and settlement patterns. Students learn how the emergence of pastoral and agrarian societies set the stage for the development of powerful empires, trade networks, and the diffusion of skills and ideas. The course concludes with an in-depth investigation of different world religions. Students examine why these religions became world religions. After exploring how these spread, students consider some of their influences in early world history.