Anthropology, as it developed in the latter part of the last century, took as its central, if not sole, field of interest the attempt to discover and explain human progress from the emergence of man before the Ice Age many millennia ago down to the complex life of civilised peoples in the modern world. It sought not only to range both living races and fossil remains of extinct forms in a succession of advancing forms, but to formulate broad sequences of discovery and invention by which new crafts and ways of life developed, and to trace the birth and development of cosmological, religious and moral ideas, and the elaboration of social institutions from the family to the state.

Such a programme was not new. It had been the subject of considerable speculation in classical thought and of more critical elaboration by the rationalist philosophers of the eighteenth century, who shared Hume's view that the history of mankind had been one of “gradual improvement from rude beginnings to a state of greater perfection.” The nineteenth century anthropologists had, however, the great advantage of being able to set their studies within the wider framework of the considerable geological and archaeological knowledge that was then accumulating and of the theories concerning biological evolution that were then being elaborated.