Stephen Hawking threw a cocktail party for time travelers from the future.
No one showed up.
What kind of asshole time travelers wouldn’t want to hang out with Stephen Hawking?
Imagine never getting to a future where traveling back in time is possible because the consequences of our actions today made it impossible to have a future.
Hitler asked himself this very question
1st rule of time travel: never try to kill Hitler
It’s either A) not bad enough to send anyone back in time to stop it B) so bad no one in the future can stop it