Abstract

Critics of ideal theory typically argue that prevailing liberal egalitarian principles were constructed under idealized assumptions and are thus ill suited to real-world circumstances where such assumptions do not apply. Specifically, they raise three related objections: (1) ideal theory cannot help us understand current injustices in the actual, nonideal world; (2) ideal principles are not sufficiently action-guiding; and (3) ideal theory tends to reflect and perpetuate unjust group privilege. This chapter explores recent philosophical work on borders and immigration in light of these criticisms. I argue that prominent arguments on both sides of the open borders debate are subject to the standard criticisms of ideal theory, and thus that a nonideal approach to migration justice is urgently needed. I conclude by suggesting several methodological desiderata for such an approach.