If you had to make one fact universally known, what would it be?

Posted by YourOldPalWill@reddit | AskUK | View on Reddit | 398 comments

Imagine you're a god. With your godly powers you decide to give every human now and forever the knowledge of a singular fact. What would it be? And why? I think I'd want everyone to know what their lives would have been like a hundred years ago. That just makes me appreciate the smaller things I have :) P.s. It can't be something that isn't known like world peace or eternal life.