This book investigates the unresolved issue of democratic legitimacy in contexts of pervasive disagreement and contributes to this debate by defending a relational version of political liberalism that rests on theideal of co-authorship. According to this proposal, democratic legitimacy depends upon establishing appropriate interactions among citizens who ought to ascribe to one another the status ofputative practical and epistemic authorities. To support this relational reading of political liberalism, the book proposes a revised account of thecivic virtue of reasonablenessalong with an...