1/ Hot take (albeit Kuhnian): Sociality makes beliefs "sticky" with respect to adherent groups. We test our beliefs against other people's beliefs more often than we test them directly against Nature.
2/ Consequently, after a regime change that alters the referent structure, the previously correct majority (i.e., orthodoxy) can't reach social escape velocity but the previously incorrect minority (i.e., heterodoxy) finds itself in a much smaller gravity well.