World life expectancy at birth reached 73.3 years by 2019
Life expectancy estimates average remaining years at a given age; life expectancy at birth is the headline number. Early Bronze Age remains imply about 24 years; by 2019 global LEB was 73.3. High infant deaths and young-adult losses once dragged the average far below what survivors of childhood might reach.
Longevity describes unusually long individual lives; maximum lifespan is the verified upper age, held by Frenchwoman Jeanne Calment, who lived 122 years and 164 days until 1997. Because the figure is an average, any one person may die decades either side of it. John Graunt and the Huygens brothers pioneered the arithmetic in the 1660s, and ecologists and actuaries apply the idea to animals, plants and life tables.
History shows how early death dragged the mean down. England averaged about 36 years at birth in the seventeenth and eighteenth centuries, among the world’s highest, while the early Virginia colony sat under 25 and roughly 40 percent of seventeenth-century New Englanders died before adulthood. English expectancy crept to 41 in the 1840s and 46 in the 1890s even as infant deaths stayed near 150 per thousand. Chinese emperors from the Qin to the Qing averaged only 41.3 years, far below Buddhist monks at 66.9.
In the twentieth century American lifespans rose by more than 30 years, about 25 of them credited to public health, despite a dip in 1918. Today’s gaps are wide: roughly 60 years in Eswatini against 84.5 in Japan in 2023, and a Madrid resident can expect about 85 while a Bulgarian in Severozapaden reaches just past 73. Poorer neighbourhoods trail richer ones within the same city.
Covid-19 erased nearly a decade of global progress. In the United States expectancy fell to 76.4 in 2021, the first two-year drop since the early 1960s, then hit a record 79.0 in 2024 as overdose deaths eased. Even so, the gap with peer nations widened from 0.9 years in 1980 to 4.1 in 2023, and researchers count 14.7 million missing Americans over that span.
Source: Life expectancy
