Achille Mbembe in this interview at Eurozine says that despite postcolonial thinking being marked by a fragmented way of thinking, there are some forms of reasoning, and some arguments, which distinguish this current of thought and which have made a major contribution to alternative ways of reading our modernity. He adds:

To begin with I'd draw your attention to the critique, not of the West per se, but of the effects of cruelty and blindness produced by a certain conception – I'd call it colonial - of reason, of humanism, and of universalism. This critique is different from that once made by the existentialist, phenomenological and post-structuralist movements in post-war France. Of course, it is chiefly concerned with the issue of self-creation and self-government. But its approach is not wholly confined to the problem of the "death of God" à la Nietzsche. It differs in many respects from the Sartrean idea of "man without God" taking the place vacated by the "dead God", and hardly subscribes either to Foucault's notion that "God being dead, man is dead too".