Most of them were overthrown by 750 B.C.
Legislative branch I believe it is
These are both religions. What is your question?
East Asia is home to approximately C. 25% of world's population.
Currently world's population is around 7.7 billion of people. Asia accommodates around 60% of total world population; Africa around 17%; Europe 10% and the other 13% is in America Latina, Oceania and Northern America. The Eastern Asia population in 2019 is around 1,657,100,041.
It was advantageously located near the coast and other settlements.