The occasion of a second edition gives an author the opportunity to reply to his critics. First of all I should like to thank those who pointed out errors and typos in the first edition. I have profited from their careful reading.
For those who expected this book to be a complete introduction to physical anthropology let me say that this was never my intention. Rather, the book is an attempt to bridge a gap between physical and cultural anthropology, between Darwinian theory in biology and works on social evolution and culture change. If anything, this gap has widened in the last several years because of the growing specialization in physical anthropology which has directed it more and more into human biology. The four-field approach which I value has, on the other hand, been held together and strengthened by the work of those physical anthropologists who have concerned themselves specifically with the evolution of culture and those archeologists who have, at least in part, adopted a biological model for their analysis. I have emphasized their work to a much greater degree in this edition.
Half this book is devoted to biological evolution and genetics. The intention here is to inform students of cultural anthropology about the dynamics of the Darwinian model in the context of genetics.