 Contemporary constructivists have largely emphasized the antimetaphysical implications of Kant’s views. Kant embarks on the project of vindicating reasoning, starting from very modest considerations about rational agency. Such starting points are not sufficient “to sustain or revive classical philosophical ambitions to build vast metaphysical structures on reason alone” (O’Neill 2015: 3; C1: A xiii). The constructivist interpretation of Kant’s ethics emphasizes the cooperative nature of the standards of reasoning: 