Killer Bees and many others! The list is endless key examples: Norway Rat, Horse, Ring-Necked Pheasant, European Starling(bird), house Cat, Neutrea, Don't forget our friend the Fire Ant Google "invasive" or "non-native" species.
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.