The noteworthy about the work of Daniel Burnham, Louis Sullivan, and Frederick Law Olmstead is they constructed high rises in urban areas on both coasts. They all took a shot at structures for the 1893 Chicago World's Fair, which presented numerous advancements.
The Mandate of Heaven concept helped individuals or groups of people gain power in a civilization. An individual would claim that they had received a Mandate of Heaven which granted them divine recognition to rule. By claiming their authority came from the gods, the people would accept them as their leader.
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The radio especially during World War II.
Technology made manufacturing more efficient
