The harder the upbringing, the more driven the fighter is. Usually.
Generally people with no father or father figure grow up to be rebellious or have a bit of a chip on the shoulder so that could be one reason. Also if there is no father the son may have to start working earlier then he might otherwise have. That's why Duran started boxing professionally.To get money for his mother.
I didn't realize Pacquiao was from Harlem. He also had a strained relationship with his father.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.