Integrates recent theoretical and empirical research on facilitating the optimal development of close relationships.

Part I. Major Theoretical Perspectives: 1. Promoting intimacy: strategies suggested by the appetitive side Harry T. Reis, David C. de Jong, Karisa Y. Lee, Stephanie D. O'Keefe and Brett J. Peters; 2. Optimal relationships as mutual fulfillment of self-determination theory's basic psychological needs C. Raymond Knee, Benjamin W. Hadden and Zachary Baker; 3. Attachment theory as a framework for the promotion of optimal relationships Mario Mikulincer and Phillip R. Shaver; 4. The self-expansion model and optimal relationship development Xiaomeng Xu, Gary Lewandowski, Jr and Arthur Aron; Part II. Concepts and Mechanisms: 5. Capitalization: the good news about close relationships Shelly L. Gable and Jason F. Anderson; 6. The positive implications of sex for relationships Amy Muise, James J. Kim, James K. McNulty and Emily A. Impett; 7. The power of diagnostic situations: how support and conflict can foster growth and security Nickola C. Overall, Yuthika U. Girme and Jeffry A. Simpson; 8. The role of passion in optimal relationships Robert J. Vallerand and Noémie Carbonneau; 9. The dyadic nature of ideal and partner perceptions in romantic relationships Lorne Campbell and Sarah Moroz; 10. For it is in giving that we receive: the benefits of sacrifice in relationships Lisa C. Day and Emily A. Impett; 11. For better or worse: compassionate goals create good relationships in good times and bad Jennifer Crocker and Amy Canevello; 12. Synchrony in positive social relationships Tanya Vacharkulksemsuk; Part III. Effective Interventions: 13. Effective interventions for optimal relationships Justin A. Lavner and Thomas N. Bradbury; 14. Forgiveness interventions for optimal close relationships: problems and prospects Frank D. Fincham, Ross May and Steven R. H. Beach; 15. Brief interventions to strengthen relationships and prevent dissolution Jaci L. Rolffs and Ronald D. Rogge.