The answer is religious ideas because the Mandate of Heaven is essentially that of there being a Chinese emperor ruling by divine right.
It resulted in the deaths of 1.5 to 2 million people from 1975 to 1979, nearly a quarter of Cambodia's 1975 population ( c. 7.8 million).
<span>The railroads had to pass through mountains and rivers.</span>
Pressure and heat causes to rocks to transform
