Rules:
- History of the world before your birth remains the same; only events happing after your birth can be changed.
- The other version of you must still be alive, you cannot go to a world that you are dead in. (This essentially forces you to murder/abduct your alt-self, so travelling has a ethical cost to it 😉)
- There may be other multiverse travellers out there
(Btw, is it ethical to murder an alternate version of your self? Is that even murder or just self-harm technically?)
About the ethics of murder or other crimes in alternate universes : I actually pondered this quite a bit before. Imagine a world where accessing parallel realities is accessible to everyone (wether it be time traveling or “booking” a divergent universe to do as you wish). Well it could be morally accepted that it’s an OK means of stress relief to insult, vandalize, harm, kill torture in these realities (as long as you behave in the main reality). My conclusion is that hurting people is wrong, even if you can revert the timeline or delete the universe as if you hadn’t done anything. Hurting people in the moment is wrong even if there are no consequences on the world around you, because there is still a lasting change on yourself.
I appreciated reading your comment. Thanks for making it :)