Bringing an evidence base to classic writings that opened psychotherapy up to more than one person at a time—the couple.

John and Julie Gottman, world-renowned for bringing an evidence base to couples therapy, report here the results of a second empirical revolution in understanding couples and families. This change is not based on their guesswork, but on state-of-the-art science. The book you hold in your hands finally completes the old general systems theory of the 1960s, which metaphorically described processes but did not actually research them.

A new general systems theory and therapy is presented here, one which will have profound implications for powerful clinical work with both couples and families. This new theory is based on 45 years of careful basic scientific research with thousands of couples and families, including synchronized observational, interview, physiological, and questionnaire data.

The Gottmans have studied some families for as...