Astudy of the processes of discovery, invention, imagination and creativity in humor, science, and the arts. It lays out Koestler's attempt to develop an elaborate general theory of human creativity. From describing and comparing many different examples of invention and discovery, Koestler concludes that they all share a common pattern which he terms "bisociation"--A blending of elements drawn from of two previously unrelated matrices of thought into a new matrix of meaning by way of a process involving comparison, abstraction and categorization, analogies and metaphors. He regards many different mental phenomena based on comparison (such as analogies, metaphors, parables, allegories, jokes, identification, role-playing, acting, personification, anthropomorphism etc.), as special cases of "bisociation".

Arthur Koestler's extraordinary history of humanity's changing vision of the universe In this masterly synthesis, Arthur Koestler cuts through the sterile distinction between 'sciences' and 'humanities' to bring to life the whole history of cosmology from the Babylonians to Newton. He shows how the tragic split between science and religion arose and how, in particular, the modern world-view replaced the medieval world-view in the scientific revolution of the seventeenth century. He also provides vivid and judicious pen-portraits of a string of great scientists and makes clear the role that political bias and unconscious prejudice played in their creativity.