Answering the Conventionalist Challenge to Natural Rights Theory.

Ben Bryan argues that the strongest challenge to natural rights theory is to explain how it overcomes the Problem of Authority. Given that our natural rights are multiply realisable by a range of equally reasonable social conventions, how or why ought one particular realisation have authority? I argue that Thomistic and Kantian solutions to this problem do not count as solutions from natural rights theory, and therefore offer my own solution. When theories of natural rights describe the rights we have in terms that refer not only to moralised act-types, but rather, tell us which non-moralised act-types ought to be moralised in the relevant way, they avoid the Problem of Authority altogether. Such theories of natural rights are singularly realisable at the level of regulative conventional rules, and only multiply realisable at the level of constitutive conventional rules. The latter form of multiple realisability does not raise the Problem of Authority. [ABSTRACT FROM AUTHOR]