Over 20 years ago, Eisenberg, Cumberland, and Spinrad (1998; Eisenberg, Spinrad, & Cumberland, 1998) published a landmark article focusing on the socialization of children's emotion and self-regulation, including emotion regulation. In this special issue, our goal was to compile current evidence delineating the impact of emotion-related socialization behaviors (ERSBs) on children's emotion, self-regulation, and developmental outcomes. The work in this issue highlights the processes involved in predicting both parents' ERSBs as well as children's developmental outcomes. Researchers have moved beyond testing individual "pieces" of the socialization of emotion model and now use innovative and sophisticated methods for testing larger models, allowing for more causal interpretations. Special issue contributors focused on longitudinal studies including ERSBs, reviews of the literature extending the original model, and the effectiveness of interventions designed to improve the emotional lives of children and their families. We focus on some of the major themes of the special issue and conclude with recommendations for policies and programs to promote youths' effective emotion-related outcomes. (PsycINFO Database Record (c) 2020 APA, all rights reserved).