Book excerpt: Clarifies and systematises the concepts and presuppositions behind the influential new field of assemblage theoryRead and download the preface, by series editor Graham Harman, and the Introduction to Assemblage Theory for free nowManuel DeLanda provides the first detailed overview of the assemblage theory found in germ in Deleuze and Guattari's writings. Through a series of case studies DeLanda shows how the concept can be applied to economic, linguistic and military history as well as to metaphysics, science and mathematics.DeLanda then presents the real power of assemblage theory by advancing it beyond its original formulation allowing for the integration of communities, institutional organisations, cities and urban regions. And he challenges Marxist orthodoxy with a Leftist politics of assemblages.Key FeaturesCritically connects DeLanda with more recent theoretical turns in speculative realismMakes sense of the fragmentary discussions of assemblage theory in the work of Deleuze and GuattariOpens up assemblage theory to sociology, linguistics, military organisations and science so that future researchers can rigorously deploy the concept in their own fields"e;