This article memorializes Diana Blumberg Baumrind (1927-2018). In her illustrious career at the Institute of Human Development at UCB, Diana largely focused on understanding the parent-child relationship. Diana was the lifelong director of the Family Socialization and Developmental Competence Project at UCB, where she undertook her longitudinal program of parenting research. Diana's research was devoted to identifying qualitative variations in direct, dyadic, and normative interactions that mothers and fathers have with their children. Diana's life work has spawned much research and has been extended to examine cultural variations in parenting, teaching styles, and leadership styles. (PsycINFO Database Record (c) 2019 APA, all rights reserved).