During the early 1900s, the populations of US cities located on the West Coast were the highest, but by 2000, the populations of cities located in the Midwest became greater than those of the East Coast.
Answer:
he invented the lasting machine which allowed to increase the efficiency of the shoe production process
The "time bombs" being experienced
were the risk of chaos as there was no central power with the federal
government and states could have broken to their own. Because of the
decentralization of power it was very difficult to collect taxes
and keep the government going smoothly, the trade was difficult between various
states and all of these were real threats at that time.