Drawing on an extensive survey of real people and over 40 years of research, this revealing volume proposes that a nonmonogamous lifestyle may be healthier for

Love, sex, and marriage are changing faster than ever before in human history. The current tidal wave of social changes will continue into the next century, and

Most couples — because they watch so many of their peers divorce and are themselves the products of failed marriages — don't have many successful long-term-

Japan has often been portrayed as a mysterious, sexless, troubled land. Birth rates and marriage rates have been decreasing for decades, and national surveys sh

“After years of debate and inquiry, the key to a great marriage remained shrouded in mystery. Until now...”—Carol Dweck, author of Mindset: The New Psycho