Perinatal mental illness is a leading cause of death during pregnancy and the first postpartum year in the United States. Although better acute care services for mental health conditions are desperately needed, urgent services alone cannot create the conditions to thrive. Cultivating well-being requires a sustained commitment to reproductive justice, "the human right to maintain personal bodily autonomy, have children, not have children, and parent the children we have in safe and sustainable communities." To support reproductive justice for pregnant and birthing people, the Rippel Foundation's Vital Conditions for Health and Well-Being framework offers a holistic approach comprising seven domains: a thriving natural world; basic needs for health and safety; humane housing; meaningful work and wealth; lifelong learning; reliable transportation; and, central to all of these, belonging and civic muscle. Here we review the evidence for each of the vital conditions as key drivers of perinatal mental health, and we outline how this public health approach can advance well-being across generations.