Predators are animals that eat other animals for food. The canines and felines eat other animals. So do lots of other animals including many fish and sea-living mamals, and lots of reptiles and even insects.
There are many birds that are predators, too An example would be a lion eating a deer A cow eating grass is NOT counted as grass are not animals and it is stationary, does not prey on other organisms and get their energy from the Sun.
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.