“A new and novel addition to core concepts of information science and technology is the Idea Collider, adapting the conceptual basis of the particle accelerator. The Idea Collider is presented as a theory of information and an information retrieval tool that deconstructs text to the underlying elements – the concepts, ideas, knowledge entities, taxons and knowledge bases – and then reconstitutes groupings of data. The authors champion the idea of a ‘multiverse of knowledge’, in contrast to the ‘universe of knowledge’ that is an important metaphor in traditional classification theory. A historical review of outstanding theoretical landmarks in classification theory explores the universe of knowledge metaphor, faceted classification theory and the universe of concepts, moving from a holistic view of existing knowledge to an elemental deconstruction that can account for all knowledge, past and future. The Idea Collider is proposed as a theoretical approach to identifying the essential parts of knowledge, dissociating those elements from culture- and time-bound dimensions and making them available for a bottom-up reassembly process.” (Richard P. Smiraglia and Charles van den Heuvel ~ ASIS&T Bulletin)