Answer:
The answer is 4 they had more than one calendar
The author expresses how younger generations looked up to their parents, teachers, governors, etc. Despite that, as the young ones grow up they realize the old generation way caused a lot of pain, death and war between socities. Thus, now the young generations want to quit the ways of their parents but because of this they are called cowards or revolutionary. In the end, the author points out that it is not about cowardy or betrayal, the younger generations feel alone because they can't follow the olders' path, it's up to them to walk in a different direction or to keep getting the same results of pain and death as before.
Answer:
His research might focus on slavery.
The Black Death, which was also known as the Black Plague.
