IOS - file does not contain an armv7s slice?

LibAddThis. A needs to be built for the armv7s architecture. If you don't have control over this then you will need to remove armv7s from valid architectures as you did.

Try setting the Build Active Architecture Only to 'YES' in the Project Build settings.

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.