So they (the slaves) were treated bad because they weren't considered human beings
It was the "production of corn" that played an important role in pre-Columbian Mesoamerican civilizations. Many of these people lacked other domesticated plants.
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After deciding that the Cuban regime could not be replaced through legal means, Castro resolved to launch an armed revolution.
A full definite reason that led to the decline of the Indus Valley Civilization is not known, as no reliable resource of that period is available right now. Every conclusion regarding the decline is based upon speculations of historians on what they believe. Through research it is clear that fall of the Harappan Civilization occurred between 1800 BC to 1700 BC(ish). It is highly believed that the Aryans were the next settlers. They were skilled fighters, so their attack might have led to the fall of Harappan Civilization. Even The human remains found during excavation of Indus valley point towards some violent because of their death
