Through time they changed it based on problems on hand, and the changes through time.
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Answer:
by the initial period of the Zhou Dynasty, a number of innovations were made, some rulers were legitimized under the Mandate of Heaven, a feudal system developed, and new forms of irrigation allowed the population to expand.
Explanation:
The themes that played a major role in changing the world between 1450 and 1750 was that plants were being spread together with animals and diseases between the Americas and the rest of the world; mainly Europe. Especially famous are cases where European contact wiped out whole villages and tribes of native American people because they were unable to cope with the bacteria and viruses.
It cause the natives to change their culture and the world around them
Answer: 1620 is the year the Mayflower landed on North American land, whichc was the first european people on america
Explanation: