A cross-disciplinary approach to the topic of sexual differentiation comprises this volume. Diverse papers are included under a variety of headings: 1) critical Periods in development; 2) embryology; 3) RNA-DNA; 4) chromosomes-growth and development; 5) physiology; 6) primates; 7) cognition; 8) cultural differences in patterns of sexual behavior; 9) normal and abnormal behavior; and 10) cross-cultural research on human behavior. The overall topic is seen as involving a consideration of molecules, man, and society with overtones of mysticism, religion, and social organization. The volume contains not only formal presentations, but also the discussion by the participants. (TL)