How and when did Pizza become popular in the U.S.?

I don't know for sure but my guess is sometime during the beginning of the 20th century once Italian Americans gained more social acceptance.

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.