Generally, we want certain ethical claims to be unconditionally true. One such claim is “Apartheid was unjust”. In this paper, I discuss a group of South African post-structuralist philosophers who call their view Critical Complexity (CC). Because of post-structuralism’s radical contextualism, CCists can only claim that things are ‘as if’ Apartheid was unjust. They cannot claim that Apartheid was unconditionally unjust. Many will find this unsatisfying. I argue that a naturalised or Darwinian notion of rationality can help CCists (and perhaps (...) post-structuralists in general) in this regard. This kind of rationality is what has come to be known as embodied rationality. We employ embodied rationality when navigating the ecological and social domains. It has, though, been co-opted for navigating the ethical domain. We can, then, claim that Apartheid was unconditionally unjust because it is embodied rational to do so. This does not involve embracing the kind of Cartesian rationality that CCists rightly reject. (shrink)