For six centuries the Khmer Empire dominated mainland Southeast Asia from Angkor, a sprawling hydraulic city whose canals, reservoirs (baray), and rice fields supported a population that may have reached three-quarters of a million — the largest pre-industrial urban complex ever mapped.
That engineered landscape was its strength and its fault line. Lidar surveys and climate records suggest that in the 14th and 15th centuries a series of extreme monsoon swings — severe droughts punctuated by violent floods — overwhelmed the water network the whole civilization depended on. Weakened, Angkor was sacked by the rising Ayutthaya kingdom and abandoned as a capital around 1431. The empire that mastered water was undone by it.
Worth remembering
- Angkor Wat is the largest religious monument on Earth, and greater Angkor the most extensive pre-industrial city ever mapped — home to perhaps 750,000 people.
- The whole civilization ran on water: an engineered web of canals and vast reservoirs (baray) that turned the monsoon into year-round rice.
Sources
- Khmer Empire founded 802 CE by Jayavarman II Encyclopaedia Britannica
- Angkor among the largest pre-industrial settlements; decline linked to monsoon failure and Ayutthaya's 1431 attack Wikipedia
A graveyard tradition: leave a stone to show you came, and remembered.