 More recent work in a Kantian vein develops this idea. Christine Korsgaard, for example, argues that humans “uniquely” face a problem, the problem of normativity. This problem emerges because of the reflective structure of human consciousness. We can, and often do, think about our desires and ask ourselves “Are these desires reasons for action? Do these impulses represent the kind of things I want to act according to?” Our reflective capacities allow us and require us to step back from our mere impulses in order to determine when and whether to act on them. In stepping back we gain a certain distance from which we can answer these questions and solve the problem of normativity. We decide whether to treat our desires as reasons for action based on our conceptions of ourselves, on our “practical identities”. When we determine whether we should take a particular desire as a reason to act we are engaging in a further level of reflection, a level that requires an endorseable description of ourselves. This endorseable description of ourselves, this practical identity, is a necessary moral identity because without it we cannot view our lives as worth living or our actions as worth doing. Korsgaard suggests that humans face the problem of normativity in a way that non-humans apparently do not: