Seth J. Prins is a social epidemiologist whose two programs of research concern the collateral consequences of mass criminalization and mass incarceration for public health, and how the division and structure of labor influence mental illness and substance use. These research programs are connected by an underlying interest in how political-economic arrangements, power relations, racialized class conflict, and various forms of social control affect population health—and how these intersect with the climate crisis. His research integrates advanced epidemiologic methods with contemporary social theory to operationalize mass criminalization, mass incarceration, and social class as dynamic relational social processes.