A: Focusing on one source of information
Well, the moment the US intervened with the affairs of the World was the moment that the US could not go back to an isolationist policy. The US simply cannot afford to stop playing a role in world affairs, due to the fact that the US is a capitalist society and that the US has a lot of exports/imports. Unless the US can reach a level of capacity where it is self sufficient, which is currently impossible to do, the US must participate in the affairs of the World in order to survive.
Filial Piety was an idea in Confucian philosophy where elders were meant to be respected the most.
It is something that is still held to majority of Asian society in which the children of the family would respect the elders the most, for instance, the grandchild and the grandmother would have the grandmother respected the most and so on throughout the family tree.
Hope this helps!
People started moving towards the South in the second half of the 20th century mostly for economic reasons. Southern states had cheaper standards of living and you could find a home easier and a job. The expenses were not as high as they were in the northern countries, mostly those in the north eastern part of the US.
The statements are not described but the conditions of the railroads in the United States after the civil war was not good.
At that time, the president was Abraham Lincoln, and he compromised that the government would subsidize the cost to build a trascontinental railroad. After the war ended railroad construction in the West and South continued for decades.
There were 2 main railway companies after the Civil War: the Central Pacific Railroad and the Union Pacific Railroad. Encouraged by government who provided funds, between 1865 and 1869, the Central Pacific laid 690 miles of track and the Union Pacific 1,087 miles.
Government helped the railway companies by giving them land, as they wanted American to expand west as cities were overcrowded in the east.