We are a biomedical anthropology lab studying the impact of social relationships on child health. Our research integrates cultural anthropology, developmental psychology, behavioral endocrinology, evolutionary medicine, and human biology, focusing on stress and family dynamics. Psychosocial stress is both a medical issue and an evolutionary puzzle due to its significant health costs. Our current projects include a 35-year longitudinal study in a rural Dominica community that examines childhood stress, family relationships, and community health through hormone and immune monitoring, ethnographic observation, and health measurements. Additionally, we investigate how hormones like salivary cortisol, testosterone, prolactin, DHEA/S, oxytocin, and vasopressin relate to affiliative relationships among family members and mates. Our goal is to understand the physiological mechanisms behind human kin networks, paternal care, mate bonding, and male bonding, providing new insights into human sociality.