Deep in the Cambodian jungle stands a stone city of impossible proportions: lotus-bud towers built for kings worshipped as living gods, surrounded by the remnants of a mathematically precise water grid. Angkor, heart of the Khmer Empire from 802 to 1431 AD, was the largest pre-industrial city in the world, home to as many as 900,000 people at a time when European capitals were a fraction of that size.

This episode explores how Jayavarman II’s god-king cult mobilized labor on an unprecedented scale, how hand-built reservoirs the size of small seas stored the monsoon like a kinetic battery and enabled three rice harvests a year, and why the daily economy was run almost entirely by women while the men marched with war elephants. Then comes the climate-driven collapse, the move to Phnom Penh, and the strangest postscript in the ruins: Japanese samurai celebrating the Khmer New Year in the overgrown temples of 1632.

• The Devaraja gambit: how declaring yourself a god-king bypasses every labor negotiation
• Conquering the monsoon: the barays, the gravity-fed grid, and three harvests a year
• A female-run economy beneath a hyper-militarized court of elephants and golden parasols
• Climate whiplash and a single point of failure: how the rigid water network broke the empire
• Samurai in the ruins, the bronze “Mona Lisa of Cambodia,” and what our cities’ god-kings might be