a 20th-century school of Western philosophy that emphasizes the elements of becoming, change, and novelty in experienced reality; it opposes the traditional Western philosophical stress on being, permanence, and uniformity. Reality—including both the natural world and the human sphere—is essentially historical in this view, emerging from (and bearing) a past and advancing into a novel future. Hence, it cannot be grasped by the static spatial concepts of the old views, which ignore the temporal and novel aspects of the universe given in man's experience. Foremost among the many modern thinkers who have contributed to process philosophy have been Henri Bergson and Alfred North Whitehead.