Abstract
Although political pluralism can have an ethical justification, it does not need one. Political pluralism can be justified on the basis of an epistemological argument about what we can claim to know, one which has a normative conclusion about how strongly we ought to believe. This is important because for pluralism to command wide assent, it needs something other than an ethical justification, since many simply will not accept that justification. Thus understood, we can see that current threats to pluralism come not just from authoritarian movements but from populism, which has already infected mainstream politics