A New Philosophy of Society: Assemblage Theory and Social Complexity is a 2006 book by Manuel DeLanda. The book is an attempt to loosely define a new ontology for use by social theorists — one that challenges the existing paradigm of meaningful social analyses being possible only on the level of either individuals (micro-reductionism) or "society as a whole" (macro-reductionism). Instead, the book employs Gilles Deleuze's theory of assemblages from A Thousand Plateaus (1980) to posit social entities on all scales (from sub-individual to transnational) that are best analysed through their components (themselves assemblages).