Manuel DeLanda is a distinguished writer, artist and philosopher. In his new book, he offers a fascinating look at how the contemporary world is characterized by an extraordinary social complexity. Since most social entitles, from small communities to large nation-states, would disappear altogether if human minds ceased to exist, Delanda proposes a novel approach to social ontology that asserts the autonomy of social entities from the conceptions we have of them. This highly original and important book takes the reader on a journey that starts with personal relations and climbs up one scale at a time all the way to territorial states and beyond. Only by experiencing this upward movement can we get a sense of the irreducible social complexity that characterizes the contemporary world.