I can't cite the study or article, but I remember reading that even in times of war or famine; people just simply refuse to move. If my memory is good, the stud

I can't cite the study or article, but I remember reading that even in times of war or famine; people just simply refuse to move. If my memory is good, the study mentioned that less than 15% of the population will move even in these terrible conditions. The article was basically about the evolutionary fitness of immigrants who came to the US.