Garn, S. (Ed.) (1964). Culture and the Direction of Human Evolution. Detroit: Wayne State University Press.
A collection of presentations given at a symposium.
Garn: "Culture and the Direction of Human Evolution". Shows that many of the features of our fossilized ancestors which were thought to be distinctive fall within the range of current human populations.
Dahlberg: "Dental Evolution and Culture". Argues that the change in human dentition (morphology and eruption order) is a result of relaxation of selection pressures.
Crenshaw: "Direction of Human Evolution - A Zoologist's View". Suggests further study of closely related but non-interbreeding groups.
Jerison: "Interpreting the Evolution of the Brain". A mathematical treatment of brain weight, brain size, neuron density, cortical size. and cortical neuron number.
Boyer: "Cultural Determinants of Biochemical Evolution". Discusses the familiar examples of diet, disease and drugs.
Etkin: "Social Behaviorial Factors in the Emergence of Man". Explores the selection pressures of group living and male/female sexual behavior.