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Foundations of Global Civilizations: AP World History Unit I

This guide explores the foundational elements of global civilizations before 1200 CE, covering legal systems, major belief systems, and significant historical events like the Byzantine Empire and the Crusades.

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The period leading up to 1200 C.E. is one of the most transformative eras in human history. It was a time when the foundations of modern law, social hierarchy, and spiritual belief were laid down across the globe. To master Unit I of AP World History, students must understand how political leaders used law to consolidate power and how major belief systems provided the "social glue" that held diverse empires together.

The Byzantine Empire and Justinian’s Legacy

In the West, as the Roman Empire transitioned, the Byzantine Empire emerged as a powerhouse of continuity and innovation. At the center of this era was Emperor Justinian. His reign was not merely about holding territory, but about organizing it through a rigorous legal framework.

Justinian is most famous for his efforts to codify Roman law. By collecting, refining, and organizing centuries of Roman legal precedents into a single, coherent system, he created a structured framework that would influence European and Mediterranean legal thought for over a millennium. Beyond law, Justinian sought to expand the imperial borders, attempting to reclaim the lost glory of the old Roman West.

Exam Tip: When discussing Justinian, don't just think about "conquest." Focus on the codification of law. AP questions often link his legal reforms to the long-term stability and administrative efficiency of the Byzantine state.

The Power of Belief: Eastern Philosophies

In East Asia, social order was maintained not through military might alone, but through deeply ingrained philosophical and religious systems that dictated how individuals interacted with their families and the state.

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