Castoriadis thinks he is the first to have grasped the nature of the social as being self-instituted. He shows that the philosophers of history, believing to grasp the new, have only perceived the different. They did not know how to see that the new is always radical creation, and that the social is a specific level of being pertaining to the only dimension to account for creation: the imaginary. This approach, could seem to prohibit the collective action in view of the emancipation. It is not the least interest of Castoriadis' thought to show that this is not the case.