 In contrast to some kinds of realism, constructivism does not seek axioms or first principles or objective values on which to ground moral truths (Bagnoli 2014, 2016). Rather than providing an external foundation for morality, it holds that in forming our intentions and beliefs, we are answerable to criteria of correctness that are internal to and constitutive of the very exercise of rationality (Korsgaard 2008: 13–15, 110–126, 207–229). “Constitutive standards are opposed to external standards, which mention desiderata for an object that are not essential to its being the kind of thing that it is” (Korsgaard 2008: 8). The constructivist conviction is that appeal to standards constitutive of agency explains with ease why such standards are normative (Korsgaard 2008: 8). They are normative because in the very activity of reasoning we are committing ourselves to being guided by them (Wallace 2012).