Some of the most emotionally powerful experiences result from the development, maintenance, and disruption of attachment relationships. In this article, I review several emerging themes and unresolved debates in the social-psychological study of adult attachment, including debates about the ways in which attachment-related functions shift over the course of development, what makes some people secure or insecure in their close relationships, consensual nonmonogamy, the evolutionary function of insecure attachment, and models of thriving through relationships.

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