When I first read this question (which is excellent), I thought I would just be an observer and I would love to talk to great literary figures - Shakespeare and Charles Dickens for example.. . But now another thought flew into my head, and if I could change just one thing, it would be that the Holocaust never happened and six million Jews were never killed. I know other people were killed in the Holocaust as well - so they also would be saved (gay people, Gypsies, Polish people, all the victims).