Ideal theory needs a realistic defense

The growth of non-ideal theory and of political realism has had a profound influence on methodological inquiry in political philosophy. It is now the norm for authors defending ideal theory to take special care to show that it can relate to the real world in the right sort of way. Two recent books—David Estlund’s Utopophobia: On the Limits (If Any) of Political Philosophy ( 2020 ), and Ben Laurence’s Agents of Change: Political Philosophy in Practice ( 2021 )—fit this mold. Both authors argue that ideal theory can be practical, and Estlund additionally argues that it can be valuable even if it lacks practical value. In this commentary, I argue that something important is missing from these defenses of ideal theory: they both fail to be realistic in a “second-order” way. I suggest that other recent work comes closer to meeting this standard.