Social justice refers to promoting fairness, equality, equity and rights across multiple aspects of society, including economic, educational, and workforce opportunities. A number of scholars across academia have called for a greater incorporation of social and racial justice approaches to the field of human development, and have asserted that social justice constitutes both a theoretical framework as well as a set of hypotheses to investigate and understand the human condition. The emergence, experience, and awareness of social injustice has to be much better understood from a psychological and developmental perspective. Four areas that reflect theoretical changes in human development research are discussed: a) socialization theories about race, b) ethnic/racial identity and development, c) developmental social identity and moral reasoning, and d) lay theories and social essentialism. Childhood is a period of intense change and development; human development research is uniquely positioned to promote change that will contribute to challenging social and racial injustice.