Why Did These 8 Ancient Civilizations Mysteriously Collapse? | Unveiled

VOICE OVER: Noah Baum
WRITTEN BY: Caitlin Johnson

In just the last few thousand years, massive civilizations have crumbled and disappeared... but why?? In this video, Unveiled looks at the Ancient Mayans, the Olmecs, the Indus Valley Civilization, the North American city of Cahokia and more... to discover why great societies rise and fall.

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Tags:

Unveiled, Mysteries, Mystery, History, Ancient History, Civilization, Mayan, Minoan, Rome, Cahokia, Mesopotamia, Olmecs, Indus Valley,