The IGNITE Study on Concentrated Investment in Black Neighborhoods

Black individuals in the United States fare worse than White individuals across almost every social, economic, and health indicator. The Black health disadvantage starts at birth, reflecting the cumulative toll of racialized social stressors and healthcare discrimination on maternal health and resulting in higher rates of preterm birth and low birth weight. Black youth are disproportionately exposed to environmental toxins such as lead and adverse childhood events such as financial hardship and neighborhood violence. Black adults have higher rates of chronic disease, including diabetes, hypertension, as well as many cancers. These and other forces culminate in a stark racial longevity gap: in Philadelphia, the location of this study, life expectancy for people living in a poor, predominantly Black neighborhood is 20 years lower than for people living in a nearby affluent, predominantly White neighborhood. The fundamental cause of these striking and pervasive disparities is structural racism - the confluence of deep historical, institutional, cultural, and ideological forces that unequally distribute resources and risks across racialized groups. Structural racism patterns health by affecting a range of interconnected, mutually reinforcing social determinants of health at the national, neighborhood, household, and individual levels. Most notably, longstanding, systematic disinvestment has resulted in highly segregated Black neighborhoods with dilapidated environmental conditions and severe economic insecurity within Black households, leading to a "feedback loop of concentrated racial disadvantage," all of which have been strongly tied to poor health. Most interventions seeking to address racial health disparities focus on individual-level behaviors and outcomes, or individual channels by which structural racism harms health. However, by failing to address upstream social determinants, these interventions have had limited population level impact. A multi-level, multi-component intervention package focused on a range of social determinants of health is necessary to meaningfully address structural racism as a fundamental cause of racial health disparities.