It means that during that time, you went along with whatever you thought was right. It was encouraged that you didnt follow laws and what not if you didnt think it was fair or if it would benefit you.
The first is to describe why something HAD TO happen. The second is to describe why something DID happen.Just "the reason" is what it is, and it can be used in three different ways. You used two of...
All of the reasons are all people. You'll have to read the book to understand why each one pertains to her suicide, 13 people, 13 reasons why [she killed herself] Happy reading!