In Political Liberalism John Rawls argues that “the reasonable” and “the rational” are “two distinct and independent” ideas. This differentiation is essential to the viability of Rawls' conception of political liberalism insofar as it facilitates the recognition and subsequent voluntary acceptance of the need for a public conception of justice that requires all individuals to forsake the unfettered pursuit of their personal ambitions. However, the soundness of Rawls' argument is premised upon a number of questionable claims that, in effect, render (...) his proposed distinction between the reasonable and the rational more chimerical than real, and in so doing critically undermine the ability of his conception of justice to secure the type of voluntary public consensus he deems necessary to establish and sustain a just and stable liberal democracy. It is concluded that the only way one can be assured of generating the sought after conditions is to develop a regulatory framework that publicly supports and protects the principles embodied in Rawls' conception of reasonableness, rather than relying upon the reasonableness of individuals to secure and nourish the required conditions. S. Afr. J. Philos. Vol.24(4) 2005: 308-320. (shrink)