The disappearance of the Norse colony in Greenland was likely not caused by a dystopian event but possibly by people choosing to leave for better opportunities in Iceland or Norway.

“Probably that didn't happen that way. This was a time when the plague was in Europe and lands would have become available in Norway and in Iceland. So, presumably, some of these Norse Greenlanders just thought, well, there's a better option for me back in in Iceland”