Perpetual motion machines are impossible, not perpetual motion. If a body travels in space (without any frictional resistance), then there is no (external) force to stop (or slow down) its motion, just like photons (light) as some light source had travelled since 13.7 billion years ago.
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.