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.
  • Icalasari@fedia.io
    0·
    22 days ago

    A necessary requirement for higher intelligence is proper, functioning empathy. If you lack this, you’re just… Incapable of intelligent thought beyond that of a particularly stupid dog