Re: The Emergence Of Superhumans
If metahumans first show ~1000 CE you aren't dealing with "the world" but with a bunch of "worlds"----West Europe, East Europe/Byzantium, Islamic, South Asia, East Asia, Meso-America, Polynesia.
There's such little communication that each of them is operating independent of each other. Metahumans may change one, but the others aren't changed. Unless #1 metahumans are supremely powerful and "world conquereres" or #2 metahumans only come to be on the "borderlands" between "worlds".
EXAMPLE: A superduperman popping into existence in central India is not going to effect West Europe or Polynesia unless you create strange situation.