The reason why things float is that gravity addresses only the mass regardless the volume. So when a person dives deep, although he moves away the same volume, the buoyant force increases because the pressure increases, and sice the pressure affects the body from every where the buoyant force increase.
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.