The Classic Maya Collapse

c. 900 CE — Mesoamerica, Classic Maya

Today: The Maya lowlands (modern Guatemala, Belize, southern Mexico)

Over the 800s and 900s, the great cities of the Classic Maya — among the most sophisticated of the ancient Americas, with full writing, astronomy, and mathematics including the concept of zero — were abandoned one by one. The likeliest culprit is a run of severe multi-decade droughts that their dense populations and warring, rigid elites could not withstand. It is climate stress amplifying every existing strain at once — the Akkadian and Bronze Age story, retold in a New World key.

Worth knowing: The Maya independently invented the concept of zero centuries before it reached Europe — and tracked the planet Venus so precisely that their tables stay accurate to within hours across centuries.

Pattern: Environmental & resource stress — An environmental shift (drought, cooling) strains food and water systems, amplifying every other tension at once.

Entry 108 of 240 in Precedent, a walk through the whole human story in order.