THE OBIGIN AND ANTIQUITY OF MAN 101 



period could do more than build stone monuments and 

 fashion polished stone implements; they understood 

 something of rude mining processes, for they left articles 

 of bronze and iron. 51 The existence of ornaments, arms 

 and cutting implements of all kinds, such as axes, knives 

 and the handles of swords dating back to the neolithic 

 period, has led Lubbock to divide the prehistoric period 

 into four epochs: the Drift Age (rough stone age), the 

 Polished Stone Age, the Bronze Age, and the Iron Age. 

 In the course of the discussion in this chapter we have 

 attempted to present some of the most authentic and im- 

 portant evidence which scientists have gathered to ex- 

 plain the origin and the great antiquity of man. In the 

 chapters immediately following we must concern our- 

 selves with the even more difficult problem of accounting 

 for man's remarkable mental development which sur- 

 passes that of any other living creature. This really 

 brings us to the study of Social Evolution, for modern 

 students of mankind have come to believe more and more 

 completely in the importance of the social factor in the 

 evolution of higher animal types. 



SUPPLEMENTARY READINGS. 

 BRINTON, D. G. Races and Peoples. 

 DARWIN, C. The Descent of Man. 

 DENIKER, J. The Races of Man. 

 GEIKIE, J. The Great Ice Age. 

 GIDDINGS, F. H. The Principles of Sociology. 

 KEANE, A. H. Ethnology. 



LUBBOCK, J. (Lord Avebury) Pre-Historic Times. 

 MARETT, R. R. Anthropology (Home University Scries). 

 METCALF, M. M. Organic Evolution. 

 ROMANES, G. J. Darwin and After Darwin, I The Darwinian 



Theory. 

 TYLOR, E. B. Anthropology. 



si See figure 42. 



