[from the text] No apology is needed for scrutinizing any part of the history of man, anywhere, if insight can be gained into culture processes. Indeed, the study of human populations is regarded as having some relation in kind and in method to the general problem of organic diversity; simple and early populations may be more appropriate to study in the present state of our knowledge than late, complex, and highly derivative groups. It is neither accident nor escape that thoughtful human geographers have given much attention to primitive groups and remote time. A science of man-i.e. social science-cannot be restricted to or by the political and economic forces and aspirations of its day.