The overarching goal of this meeting is to explore current and future research on the impacts of the Second Demographic Transition (i.e., increasing family complexity, instability, heterogeneity) on middle- and later-life health and well-being for individuals directly experiencing the transition. The meeting established the current state of knowledge as well as important substantive and methodological areas for future research. Participants included a mix of scholars who have studied relationships between families and health across the life course, and who represent expertise with existing data resources focused on younger cohorts. A