He shot himself in the head
Usually it is the invasions and communism
Many people who immigrated to the United States during the Gilded Age moved to the coasts of the United States. It really depended on where you were from, so if you were of European origin, you most likely migrated to the eastern coast, but if you were of Chinese origin, you most likely migrated to the western coasts. It was just based on what was the closest shore by boat.
The purpose of the United States signing treaties with Native Americans was so that Native Americans can have land in North America.