The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
Members of the American upper class feel the need to build such opulent homes because it is a way to show fellow Americans that they have the power and status to exemplify the successful American way of life and to show that they are capable to accomplish their goals and whatever they want.
These people love to show their money and other possessions as a big house in exclusive neighborhoods. It is a way to say they are winners and are above the other social classes.
Sociologists consider that almost 2% of Americans are the wealthiest people in American society.
Pittsburgh is where Fort Duquesne once stood.
Answer:
Sometimes people are petty, I'm sorry that happened to you. :(
Natives Americans were mostly killed off by the diseases brought over by the Europeans that they had never been exposed to before like smallpox or measeles.
