In plain terms
Social determinants of health
The conditions where people are born, live, learn, work, play, worship, and age that shape their health: income, education, health care, neighborhood, and community.
The shift ran from 7 a.m. to 7 p.m., seven days a week, for about $700 a month. I worked a factory floor in the Panyu District of Guangzhou, China, next to the people who kept that schedule, and I lasted about an hour. The plant made fiber optic and telecommunications equipment. I was helping the company, headquartered in Hong Kong, open its first North American office, in Atlanta, and I needed to know the product well enough to explain it to customers.
The work was back-breaking. It hurt your hands and took total concentration, and you wore a protective suit just to walk in, to keep the room clean. The people doing it were the happiest coworkers I have ever had. They laughed, asked me about my experience in a factory, and told me how lucky they were to send money home to their families. The plant was clean and air-conditioned, with a dining hall nearby.
Most of them came from farming villages. In the city, people often looked down on them, and many barely shared a language with the locals. Back home, the alternative was tending a cow or working a small plot to survive.
What are the social determinants of health?
Public health has a name for what I was looking at. The U.S. Department of Health and Human Services defines social determinants of health as “the conditions in the environments where people are born, live, learn, work, play, worship, and age that affect a wide range of health, functioning, and quality-of-life outcomes and risks.” Its Healthy People 2030 framework sorts them into five areas: economic stability, education access and quality, health care access and quality, neighborhood and built environment, and social and community context.
The idea is simple and easy to forget: most of what makes people healthy or sick happens outside the clinic. The County Health Rankings model, from the University of Wisconsin Population Health Institute, gives clinical care 20 percent of the weight among the factors that drive a community’s health, and social and economic factors 40 percent. Those weights are a model, not a measurement. The direction is the point.
What does that look like in U.S. numbers?
Take teen births, which public health tracks closely. A 2016 CDC study sorted U.S. counties by their teen birth rates in 2013 and 2014. In the fifth of counties with the highest rates, the median was 57.1 births per 1,000 females aged 15 to 19; unemployment was 10.5 percent, 19.9 percent of adults held an associate degree or higher, and average family income was $46,005. In the fifth with the lowest rates, the median was 14.6 births per 1,000; unemployment was 7.6 percent, 40.4 percent held a degree, and average family income was $73,967.
Two cautions keep those numbers honest. They are county averages, so they say nothing certain about any one family. And they show that jobs, schooling, income, and health travel together, not which one causes the others.
Poverty itself is a narrower measure than people often assume. The Census Bureau counted 35.9 million people in poverty in 2024, an official rate of 10.6 percent. Its Supplemental Poverty Measure, which counts government benefits and household expenses, put the rate at 12.9 percent.
Where does the law come in?
Many of these conditions are written into law. Wage and hour rules set what a shift pays. Housing codes decide whether a landlord has to fix the mold behind a child’s asthma. Eligibility rules decide who gets Medicaid, food assistance, or a housing subsidy, and even what counts as income. School assignment rules decide where a child learns.
China offers a sharp example. For decades its household registration system, called hukou, tied access to city public schools and social services to the place a family was registered, which for most rural migrants meant their home village. Reforms have loosened those rules, but researchers still document barriers for migrant children in city schools. A legal status, not only a paycheck, shaped what those families could do.
In the United States, the best-known legal answer is the medical-legal partnership: lawyers working alongside doctors, nurses, and social workers on the legal problems behind health problems. The first one started in 1993 at what is now Boston Medical Center, under the pediatrician Barry Zuckerman. A pediatrician can treat a child’s asthma. A lawyer can make the landlord fix the mold, appeal the benefits denial, or stop the utility shutoff.
What I take from it
I came to law school with a public health degree. Our zip codes matter more than we think. An investment in jobs, farms, and factories, so that people can live and take care of their kids, is vital. Public health calls that the social determinants of health. A lot of it gets decided in statutes, codes, and eligibility rules, which is where lawyers come in.
Sources
- Healthy People 2030: Social Determinants of Health (HHS)
- Romero et al., Reduced Disparities in Birth Rates Among Teens Aged 15 to 19 Years, MMWR 65(16), April 29, 2016 (CDC)
- Is the County Health Rankings Model Right or Wrong? (County Health Rankings)
- Poverty in the United States: 2024 (U.S. Census Bureau, September 2025)
- Migrant children’s schooling in urban China (N-IUSSP)
- Medical-Legal Partnerships (Pro Bono Institute)
