Sex, Time, and Power: How Women's Sexuality Shaped Human Evolution by Leonard Shalin (ISBN - 9780142004677)
(USED) Very good condition
"As in the bestselling The Alphabet Versus the Goddess, Leonard Shalin's provocative new book promises to change the way readers view themselves and where they came from. Sex, Time, and Power offers a tantalizing answer to an age-old question: Why did big-brained Homo sapiens suddenly emerge some 150,000 years ago? The key, according to Shalin, is female sexuality. Drawing on an awesome breadth of research, he shows how, long ago, the narrowness of the newly bipedal human female's pelvis and the increasing size of infants' heads precipitated a crisis for the species. Natural selection allowed for the adaptation of the female to this environmental stress by reconfiguring her hormonal cycles, entraining them with the periodicity of the moon."