You are given an opportunity to hard reset our universe (particularly, the Earth). You are also allowed to change one rule about the new universe. What rule would you change?
The rule could be anything, as funny or as serious as you want. The universe will progress in a similar way that it has up until this point, unless your changed rule prevented it from doing so.
Some examples might be:
The invention of currency is not allowed.
Iron is slightly less stable.
The Ancient Greeks are able to cultivate Silphium, which does not go extinct now.
It's little ones like this that have such insidious implications.
Even without a evil genie rule... No stds.
Which means that sex has no touching
Or
Everything is super fucked up - bacteria/viruses/fungi can no longer transfer from creature to creature through touch... I don't have the knowledgebase to even imagine what the results of this would be but I think somewhat catastrophic....