The Harappan civilization is the last of the Neolithic Civilizations. They were the main founders of iron and helped create the iron age, which becomes important in the time that follows. They were located along the indus river and were considered one of the biggest accomplishments of the Indus Valley civilization.
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The cause is Feudalism
In feudalism system, normal citizens will work for the nobles in exchange of salary and protection.
Because of this, many people started to migrate into rural area where they will be given a certain amount of land by the nobles to be taken care of.
