Trilogy, Bröckers was working a book on a "new science of conspirology" in Sept. 2001, which led to his work on 9/11.[citation needed] His proposed scheme of thought would include "a general theory of conspiracy theories" as a guide to assessing their validity, instead of "blindly demonizing" them.[citation needed] This proposed book does not appear to have been published.[original research?] He assigns conspiracy a key role in history and biology as a powerful hybrid of the forces of competition and co-operation.[citation needed]