*Reveals the major problems facing couples in the twenty-first century and provides clinicians with practical insights and up-to-date information into relationship success. *Uncovers how long-term relationships protect emotional and physical health and resilience, and protect against mental illness, loneliness and suicide in a changing society. *Guides therapists on the modifiable dynamic and protective factors in relationships which lead to relationship longevity and reviews in the light of the evidence.

*Reveals the major problems facing couples in the twenty-first century and provides clinicians with practical insights and up-to-date information into relationship success. *Uncovers how long-term relationships protect emotional and physical health and resilience, and protect against mental illness, loneliness and suicide in a changing society. *Guides therapists on the modifiable dynamic and protective factors in relationships which lead to relationship longevity and reviews in the light of the evidence.