beyond selfhood in a narrow sense, and form the basis of a theory of human cognition. For Mead the thinking process is the internalized dialogue between the 'I' and the 'Me'. Mead rooted the self's "perception and meaning" deeply and sociologically in "a common praxis of subjects," found specifically in social encounters. Understood as a combination of the 'I' and the 'Me', Mead's self proves to be noticeably entwined within a sociological existence. For Mead, existence in community comes before individual consciousness. First one must participate in the different social positions within society and only subsequently can one use that experience to take the perspective of others and thus become 'conscious'. Philosophy of science Mead was a major American philosopher by virtue of being, along with John Dewey, Charles Peirce and William James, one of the founders of pragmatism. He also made significant contributions to the philosophies of nature, science, and history, to philosophical anthropology, and to process philosophy. Dewey and Alfred North Whitehead considered Mead a thinker of the first rank. He is a classic example of a social theorist whose work does not fit easily within conventional disciplinary boundaries. As far as his work on the philosophy of science, Mead sought to find the psychological origin of science in the efforts of individuals to attain power over their environment. The notion of a physical object arises out of manipulatory experience. There is a social relation to inanimate objects, for the organism takes the role of things that it manipulates directly, or that it manipulates indirectly in perception. For example, in taking (introjecting or imitating) the resistant role of a solid object, an individual obtains cognition of what is "inside" nonliving things. Historically, the concept of the physical object arose from an animistic conception of the universe. Contact experience includes experiences of position, balance, and support, and these are used by the organism when it creates its conceptions of the physical world. Our scientific concepts of space, time, and mass are abstracted from manipulatory experience. Such concepts as that of the electron are also derived from manipulation. In developing a science we construct hypothetical objects in order to assist ourselves in controlling nature. The conception of the present as a distinct unit of experience, rather than as a process of becoming and disappearing, is a scientific fiction devised to facilitate exact measurement. In the scientific worldview immediate experience is