With nearly 50 percent of marriages ending in divorce, a growing percentage of women over age 40 choosing not to have children, and more than 3 percent of the population identifying as LGBT, modern life is clearly in need of some modern relationship advice.
Since Darwin's day, we've been told that sexual monogamy comes naturally to our species. Mainstream science—as well as religious and cultural institutions—has maintained that men and women evolved in families in which a man's possessions and protection were exchanged for a woman's fertility and fidelity. But this narrative is collapsing. Fewer and fewer couples are getting married, and divorce rates keep climbing as adultery and flagging libido drag down even seemingly solid marriages. Learn More