What if Isabelle, his mother has been loyal to his father, what would be the effects of it to Edward III, what would be the effects of a more happier childhood to Edward III.
You would have to change the temperament of Edward II. Even before his ascension to the throne he had his favorites. You would have to make him a stronger, more authoritative king, that was what attracted Isabella to Roger Mortimer. He was everything that Edward was not..