That trough time, a specie of animal, plant, bacteria can change When a life form reproduces, one of its"babies" may be different from its parents because of genetic mutation. Sometime, this mutation may give it an advantage over other individuals of its specie. (e.g. : A giraffe has a higher neck and can search food on high trees.
) Because of this advantage, the life form that is different ( we will call it A ) can live longer and has better chances to reproduce. The life form that has not this advantage ( we will call it B ) will live less longer and will have less chances to reproduce. Because of that, the population of "A" will increase and the population of "B"will decrease.
In the end, there will only be "A.
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.