Mistakes

As i was reading the crucible and thinking about all the outrageous reasons people have been killed throughout the history of this world, it got me thinking. The mistakes of the Holocaust and all other genocides shape the world we live in today. But similar to the debate on memory erasing, id like to suggest the Pros/cons of a time machine. If someone could go back in time to stop or lessen horrific events, would/should it be allowed? I think that there is no way it should be allowed. In other posts ive backed up opinions by saying everyhing happens for a reason, and horrific events are no exception. I think everything thats happened up until now, and everything that will continue to happen is based on fate. That said, mistakes as outrageous as accusing someone as having the devil in them, or being a witch, shape the world we live in today and should not be messed with. If you dont agree, watch the Back to the Future movies and see what a time machine could do..