Culture, extrinsic information coded in symbols, is a condition of our viability as a species. … The only way for humans to produce specific behavior appropriate to the challenges thrown up by their environment is to use the manifold cultural codes that their peculiar neural structure has made possible. … Humans proceed, and can only proceed, by gathering and manipulating information (including information about how to gather information) which is stored not in the physiological structure of the body but in the intersubjective space of human signifying practice and in the objects—books, maps, clothing, tools, sacred goods, illustrations, the built environment—that give it material form.