Political liberalism’s central commitments to recognizing reasonable pluralism and institutionalizing a substantive conception of justice are inconsistent. If reasonable pluralism applies to conceptions of justice as it applies to conceptions of the good, then some reasonable people will reject even many liberal conceptions of justice as unreasonable. If so, then imposing these conceptions of justice on citizens violates the liberal principle of legitimacy and related public justification requirements. This problem of justice pluralism requires that political liberals abandon their commitment to (...) institutionalizing a substantive conception of justice. Instead, political justification should be limited to the public justification of a modest scheme of rights and a set of constitutional rules. Justice pluralism chastens the ambitions of political liberalism while pushing the political liberal research program in new and promising directions. (shrink)