Anything STEM related will be both relevant and flexible enough to move in various sci/tech directions. There are too many lawyers and MBAs out here, and most are overvalued. Creating new things is something computers can't (easily) do.
Applying rules is something computers do far better than us.
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.