 Even if these notorious philosophical difficulties can be resolved—as defenders of expertise approaches to virtue must think they can—matters remain complicated, because if moral expertise is like other expertises, practice alone—assuming we have a clear notion of what “moral practice” entails—will be insufficient. While practice matters in attaining expertise, other factors, such as talent, also matter (Hambrick et al. 2014; Macnamara et al. 2014). And some of the required endowments may be quite unequally distributed across populations: practice cannot make a jockey into an NFL lineman, or an NFL lineman into a jockey. 