It is possible. One of the criteria is that you have "Some symptoms that cause impairment were present before age 7 years. " But you can have ADHD without meeting every criterion.
See my source. Then see your doctor.
Back when toy were a child tour parents probably didn't notice it and thought you were acting out but yes you can still have adhd no matter how old you are if you haven't had the proper treatment.
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.