A photojournalist is a visual storyteller whose main roles are to photograph, edit, and present images in a way that their artworks tell people a story. He must be able to set up the photo for top quality, edit it without trace that it was changed, and upload it on the Internet for publication.
His subjects vary greatly, but he usually concentrates on social issues.
It was just one of the MANY reasons that resulted in the 2nd WW. Maybe if they hadn't been so harsh towards Germany and blamed them for the cause of WW1 then the 2nd one most likely wouldn't have happened.