One of the best theoretical questions out there is this: “If you had a one-time-only use of a time machine, when and where would you go?” Of course this query should invoke a seriously wide variety of responses, all of which, however, would fit into only 3 categories:
1) “I want to go back and change something in my personal past,” like perhaps going to a certain college, or maybe hanging out with a deceased loved one a little more.
2) “I want to go back and be a fly on a wall for some awesome event or era,” maybe the painting of the Sistine Chapel or to just live during the Roaring Twenties.
3) “I want to go back and change history,” like possibly making sure Hitler got accepted into art school or maybe infecting Lee Harvey Oswald with Ebola so he won’t be at work the day the Kennedy Motorcade passes by.