This volume (number 12) is subtitled Interpersonal Relations across the Life Course. It is inspired by the increased awareness in recent years of the way in which structural and psychosocial dimensions of the life course shape interpersonal relations. Interest in this issue has included both the maintenance of long-term relationships that may span many phases of the life course and the development of relationships that are specific to particular phases. The volume is a combination of invited and author initiated papers–all anonymously peer reviewed–that seeks to present a cohesive source of information on the multiform nature and influences of interpersonal relations from a variety of perspectives, theoretical frames, and substantive areas. Contributions reflect:Macro-micro linkages and interpersonal relations, (i.e., age structures, social institutions, and race/ethnicity) Parenting across the life course Parent-adult child relations and transitions Transitions in non-kin relationships Social relationships and well-being