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.
  • LainTrain@lemmy.dbzer0.com
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    2 months ago

    Have to say this wouldn’t affect me, not because I don’t have any empathy but only cold, logical political solidarity, but also because I wouldn’t really class myself as particularly intelligent. I’m just walking here