It looks like your user model has wrong type of attributes. Make sure your database contains valid type of fields. Learn more here: github.com/plataformatec/devise.
That could be an issue with Devise if it is getting a number as a string, but thinking it's actually a number.
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.