Imagine a perfectly gridded mega-city that housed 100,000 people and built the third-largest pyramid on Earth, then was burned from the inside out. Despite its monumental ruins, we don't know its real name or who ruled it.

This episode unpacks Teotihuacan, the Mexican metropolis that predates the Aztecs by a thousand years. We trace its rise from a climate-refugee influx to a continental superpower, its mysterious collective governance, and the environmental crisis that tore it apart.

• Why it was NOT an Aztec city, and how the Aztecs only named these abandoned ruins "the place where gods were born"
• How volcanic eruptions at Cuicuilco drove refugees here, who built self-watering chinampa agriculture to feed the boom
• The eerie absence of kings: no royal tombs or statues, just multi-family apartment compounds and coll ...