 A very different practical argument for generalism has roots in the Kantian tradition and has recently been advanced by Stephen Darwall (2013, see also Darwall 2006). He contends that publicly formulable principles are necessary for us to realize a valuable form of interpersonal accountability in our shared moral life. He further argues that such accountability is necessary for moral obligations (though not necessarily for moral reasons). Within the framework here developed, one might see Darwall’s argument as a defense of generalism about standards but with the argument restricted to standards of moral obligation. Alternatively, one might see it as a practical argument for attempting to formulate shared public principles because, if we fail to do so (or fail to continue to do so), we will lose something that we take to be valuable about morality, namely the respect for persons that is inherent in a practice of interpersonal accountability (Darwall 2013: especially 183–191). Darwall’s argument fits very well with Kantian contractualism of the sort defended by T.M. Scanlon, which emphasizes the value of our being able to justify ourselves to others and sees principles as mediating justification. It might also be instructive to compare Darwall’s argument with some of the ideas found in the tradition of discourse ethics associated with Jürgen Habermas (see, e.g., Habermas 1990). An important challenge for this argument is to persuasively establish the premise that accountability (or interpersonal justification) must advert to principles. Particularists may allow that accountability is an important value while urging that the interpersonal process of holding one another accountable can proceed entirely in terms of the reasons, defeaters, enablers, and intensifiers that are at play in the case at hand.