Answer:
1. You could be sending innocent people to death
2. It goes against human nature
Explanation:
The major reason for Zheng He's voyages during the 15th century was to increase the importance of Chinese trade as well as the reputation of his nation, China. The largest port in the world at that time was Calcutta in India where the Chinese spent more time trading with the locals.
This is called "Discontinuation Syndrome." It is one side effect of taking antidepressants that will happen after stopping taking the drug. It is widely recognized and studied in psychology.
Answer:
The Asiento, the official contract for trading in slaves in the vast Spanish territories was a major engine of the Atlantic slave trade. When Spain first enslaved Native Americans on Hispaniola, and then replaced them with captive Africans, it established unfree labor as the basis for colonial mass-production.
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There is a capital difference between all the other civilizations mentioned, even if Greeks were heavily influenced by them and adopted many of their advancements and scientifical discoveries or art, technology and so far.