 The debate over anti-sectarianism also bears on the question of whether, and to what extent, theories of public reason are compatible with perfectionism in political morality. Perfectionists hold that political power may legitimately be used by appeal to claims about the intrinsic or inherent value of certain activities of ways of life (Wall 2021). It has been widely assumed that perfectionism is incompatible with the idea of public reason since the constituency of persons to whom exercises of political power must be justified can be assumed to disagree in deep and permanent ways about matters of the good life. This widespread assumption has recently been challenged, however (Kim 2016; Tahzib 2019.  Also see Chan 2000). These authors suggest that the constituency of justification can and should be idealized to incorporate certain ideas about the good life. Whether, and to what extent, this reconciliation of public reason and perfectionism is plausible depends in part on one’s views about anti-sectarianism as a desideratum. 