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the ruler was the highest social class
They did not have a stable government, or any kind of complex system holding them together.
B. the Reformation
Having a class scheduling system can be difficult because of the conflicts that arise naturally whenever there are multiple people scheduling any event. This is typical of scheduling any event at all, even non class events.
grid system
Because historically that is the only class able to afford any decent form of education; any lower class lacks the resources to reach such a standard and typically relies on simpler and much-reduced models of that system.
The Anasnazi Indians were the first to create an irrigation system.
Type your answer here... models on civilizations eg:chinese civilization
By the beginning of the ancient civilizations of Mesopotamia.
Irrigation.
do Australia have class system
The Indian system that places a person in a certain class at birth is the Caste System. The caste system is a social class system.