This project advances the study of global family change (GFC) by exploring the complex ways in which families are changing across low and middle-income countries (LMICs). The innovation of the project lies in the premise that we need better foundations for understanding why and how families change on a global scale. While country-specific and small-scale comparative research on GFC exists, sociologists currently lack a global and comprehensive lens on these changes of family systems, particularly in LMICs, where change is most rapid and dramatic. The project contributes to both theoretical and empirical understandings of the determinants and consequences of GFC, training of scholars from LMICs and disadvantaged backgrounds, and the creation of an easily accessible data infrastructure for studying GFC. The research agenda promoted by the project will also help inform discussions, evaluations, and developments of family, health, and gender-related policies worldwide.