Against the Moral Powers Test of basic liberty

In Rawlsian political philosophy, “basic liberties” are rights subject to a high degree of protection, such that they cannot easily be overridden for concerns of stability, efficiency, or social justice. For Rawls, something qualifies as a basic liberty if and only if bears the right relationship to our “two moral powers”: a capacity to form a sense of the good life and a capacity for a sense of justice. However, which rights are basic liberties is subject to frequent ideological debate, which Rawlsian libertarians and Rawlsian socialists arguing that Rawls's own view is mistaken or incomplete. I argue that problem is that Moral Powers Test does not quite work. Only a small amount of liberty—not enough to qualify a society as liberal—can clearly be shown to pass the Moral Powers Test. One might attempt to rescue the Moral Powers Test by relaxing or modifying its requirements, but, I will argue, there appears to be no unproblematic and nonquestion‐begging way to do so. The Moral Powers Test must be abandoned or, at least, requires some unknown but radical revision or require supplements from outside Rawls's own theory.