Because of amygdala function and media competition, our airwaves are full of prophets of doom. Because of the negativity bias and the authority bias—our tendency to trust authority figures—we’re inclined to believe them. And because of our local and linear brains—of which Dunbar’s number is but one example—we treat those authority figures as friends, which triggers the in-group bias (a tendency to give preferential treatment to those people we believe in our own group) and makes us trust them even more.
