Some of them are biological and some are cultural. Some are probably false also Males are more aggressive in general because of higher levels of testosterone, a male hormone. Nurturing is part of the maternal instinct.
Most male mammals take no part in the care of the young, but they have to compete for the right to mate with females. All female mammals have to nurse their young, but few of them have to compete for mates.
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.