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.
  • @Cryophilia
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    52 months ago

    He’s suicidal but also wants everyone else dead too

    • @molten
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      12 months ago

      Ye. Also literally cool because global warming and all. It almost all ties together.