A relatively small community could just have few bad years in a row for whatever possibly multiple reasons and be wiped out.
The Vikings were in Greenland for over 300 years (1000 - 1300s), and they kept extensive journals that have survived.
In those, there are first-hand accounts of a definite progression of weather getting colder, summers shortening and crops failing, and glaciers steadily advancing down from the mountains. Pretty strong evidence of climate change (and a little scary), but of course, the GW advocates don’t want to talk about THAT evidence.
“A relatively small community could just have few bad years in a row for whatever possibly multiple reasons and be wiped out.”
I can say, with every bit as much “scientific rigor” as the Profits of Doom such as Mann and his AGW Cult o’ Warmenists that those Vikings only needed to stock up on frozen microwave dinners while they applied for US welfare gifts of grain and protein drink mix.
Therefore, their disappearance must be related to Aliens kidnapping humans for experimentation purposes.
My science is just as solid as theirs.