 According to some interpreters, Kant’s defense of the autonomy of reason takes place within a project of identifying the foundation of morality, which is realist in spirit because it appeals to the absolute value of humanity (Wood 1999: 157, 114; Rauscher 2002; Langton 2007; Johnson 2007; Hills 2008; Krasnoff 1999; Kain 2006a,b; Irwin 2009; Galvin 2011). There are different ways to argue for this point. First, critics point out that Kant’s defense provides a transcendental argument, an argument that highlights the conditions under which it is possible for something to be the case. The value of humanity is the condition of the possibility of all valuing. To such critics, the appeal to a transcendental argument for the value of humanity already counts as a markedly realist move (Larmore 2008: 121; Watkins &amp; Fitzpatrick 2002; Fitzpatrick 2005; Tiffany 2006). The issue revolves around the nature of transcendental arguments, and whether they commit us to moral realism, something that constructivists deny.