Answer: Attempt to make sense of the atrocities he experienced.
This is an autobiography, so it is a kind of recollection of his memories and trying to understand all of it.
However, he also wanted to tell about his first-hand experience with Holocaust (just like in his novel Night), and to warn the humanity about the consequences of keeping silent and ignoring the evil until it grows so strong that it starts threatening the whole world.
They all stopped liking Eachother
Answer: Settlers and tribes both had effects on each other. On many trails headed west, settlers traveled in fear of attack from tribes who would rob or kill members of caravans. Tribes would attack stagecoaches and wagons that traveled across their lands. On the other hand, settlers constantly encroached on tribes’ lands. When settlers drove cattle, built railroads, established trails, and created new settlements, tribes were driven off of their lands. Often, this happened to tribes that had already relocated from other parts of the country to escape settlement. As the two groups fought over land, tribes struggled to get the resources they needed. While both groups profited from each other, both also were harmed by expansion in different ways.
