In 1250 CE, while construction began on Westminster Abbey, the largest city in North America stood not in Mexico, but in present-day Illinois. Cahokia housed 20,000 souls in the shadow of earthen pyramids�??then vanished without explanation.
In the ninth century, the Maya abandoned gleaming cities that had stood for centuries—Tikal, Copán, Palenque—leaving behind monuments that would confound explorers a thousand years later. The reasons involve drought, war, and a writing system that recorded the final days.
Around 1300 CE, the Ancestral Puebloans left behind elaborate stone cities tucked into southwestern cliffs—structures that had sheltered communities for generations. The question of why they departed has puzzled archaeologists for over a century, revealing a story far more complex than simple drought.
The morning the Green Corn fires were lit, Brown Stone found a crack in the great storage jar she had carried from her mother’s house, and she took it as a
