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.
  • esc27@lemmy.world
    57·
    22 days ago

    Instant karma. Weighted based on intent. E.g. If CEO cuts benefits to improve his stock value, then his balls explode. If a driver accidentally cuts someone off but feels bad about it, a full mosquito hits the windshield.