Finding the love of your life and holding onto that relationship is more difficult than ever. The problem hasn't gone unnoticed. From relationship therapists to speed-dating, self-help books to online matchmaking, an entire industry has developed to help us navigate the bumpy road of relationships. Yet in spite of the availability of all these resources, many of us still struggle to discover and keep the love of our lives. That is, until now.

This groundbreaking book from the frontiers of psychology offers startling new research about the one missing factor that is vital to...