In this revolutionary work -- a landmark that signals the true beginning of feminist medicine -- a doctor, a philosopher, and a scientist prove that by postponing marriage and motherhood, women have accelerated the aging process, resulting in earlier menopause and, ultimately for thousands, earlier death.

The lightbulb put us out of sync with nature. Way back when, people spent the summer sleeping less and eating heavily in preparation for winter because light triggers the hunger for carbohydrates. Now, with light available 24 hours a day, we gulp down food all year long.