Generations of Americans born after 1970 are dying at higher rates than their parents did at the same age, and it is starting to show up in the national life expectancy numbers.
A new analysis of U.S. death records warns that a downturn that started around 2010 has already eaten into decades of steady progress in how long Americans live. Researchers say the trend is big enough that it could stall, or even reverse, long-term gains in life expectancy if nothing changes.
The work appears in the Proceedings of the National Academy of Sciences and relies on death data by age, year and birth cohort from 1979 through 2023 to separate what is happening to specific generations from what is happening in particular calendar years. The research team from Tufts University, the University of Texas Medical Branch and the Max Planck Institute used Lexis diagrams and cohort models to track how mortality shifted across generations.
"It also portends an unprecedented longer‑run stagnation, or even sustained decline, in US life expectancy," the paper cautions. The study flags people born between 1950 and 1959 as a key turning point: cohorts born before that window generally saw improving survival, while many born after it are showing worsening mortality patterns at multiple adult ages, according to the Proceedings of the National Academy of Sciences.
The problems are not confined to one headline issue like overdoses. In a Q&A reported by MedicalXpress, the authors point to cardiovascular disease, some cancers (especially colon cancer) and a cluster of "external" causes, including drug overdoses, suicides, homicides and traffic crashes. "This pattern points to deeper, systemic forces shaping health," lead author Leah Abrams said, citing obesity, smoking history, stalled cardiovascular gains and social and economic stress as overlapping drivers. The paper uses both cohort and period evidence to argue that the recent slowdown cannot be pinned on any single cause.
What the Numbers Say
On the surface, the shift shows up as a sharp slowdown in life expectancy gains. Between 2010 and 2019, U.S. life expectancy increased by only 0.26 years. For the previous fifty years, gains averaged about 1.78 years per decade, according to coverage of the research from News‑Medical. That is a steep comedown for a country that spent decades banking on longer lives.
Federal life table data show some bounceback after the COVID shock, with improvements in 2022 and 2023. Even so, overall life expectancy in 2023 still sat below pre‑pandemic 2019 levels, according to the National Center for Health Statistics.
Why Public Health Officials Worry
Public health experts are most alarmed by what the trends suggest about the future. Cohorts that are already doing worse in their 30s and 40s are likely to carry that elevated risk with them as they age, which could lock the country into years of flat or sagging life expectancy unless multiple risk factors are tackled at once.
The Q&A and the underlying study describe a mix of medical and social steps that could blunt the damage, including tighter control of hypertension, diabetes and obesity, wider colon cancer screening and broader access to overdose reversal drugs, per MedicalXpress. None of those fixes are quick, which is exactly what worries long-range planners.
What This Means Locally
For policymakers in Washington and at state and city health departments, the message is that national averages hide deep local divides. Budgets and prevention strategies are already being shaped by where those gaps are widest.
Recent mapping of state and county disparities shows that communities with long‑running social and economic disadvantage have seen much smaller gains in longevity, according to Frontiers in Public Health. That kind of data is helping drive more targeted prevention efforts and pushes to improve access to care in specific counties and neighborhoods rather than relying on one‑size‑fits‑all programs.
The full PNAS study has already drawn attention from national and local outlets, including coverage in the regional outlet Daily Voice. Health officials and local leaders are expected to watch upcoming state and county mortality releases closely to see whether the generational patterns highlighted in the paper show up in their own backyards.
