<p>Anthropology's original's aim, that of Maine and Morgan in the second half of the nineteenth-century, was to explain social variability. Behind that variability, anthropologists searched for regularities that a theory would explain. It was thus both comparative and positivist (aiming to be scientific). The first theory to emerge was evolutionism. It was soon followed by functional structuralism, structuralism and all the other 'isms' that came...