John K. Coffey, PhD, MSW, is the Arnold Gesell Visiting Assistant Professor at the Yale Child Study Center. He is the second person to earn a PhD in Positive Developmental Psychology. Prior to that Dr. Coffey earned a Masters in Social Work degree at the University of Michigan and worked as a child and family therapist in Detroit, Michigan. Dr. Coffey’s research focuses on understanding and promoting well-being from infancy into adulthood. To do so, he merges theories from positive, developmental, and social psychology with a focus on emotions and relationships across the lifespan. His research often spans 3 or more decades. He has partnered with organizations to build online and in-person interventions to promote well-being for adults and children.