This paper examines Castoriadis’ concept of time as ontological creation in relation to the activation of the project of autonomy. We argue that since Castoriadis presents as a practitioner of the creation of time as radical autonomous thinking, this is the standpoint from which to assess his claims. Through an examination of Castoriadis’ claim that the practice of autonomy depends upon it being activated by a willing singularity who accepts the Chaos of society and of the world, we argue that (...) Castoriadis’ position presupposes an effective contrast between the autonomy of significance that he advocates and the heteronomy of insignificance that he laments. If, as we suggest, both these orientations accept the Groundlessness of the world, then Castoriadis’ appeal to the awareness of a willing singularity is not sufficient to distinguish the practice of radical autonomy. To this extent, his elucidation of the radical imaginary time of ontological creation remains incomplete. (shrink)