On May 6, a gunman opened fire in a Texas supermarket, killing eight people, including several children, before being shot dead by police. Particularly bloody, this episode is not uncommon in the U.S.: it is the 22nd mass killing (resulting in the death of more than four people) this year.

Gun deaths are one reason why life expectancy is falling in the U.S. But it's not the only one. Last December, the American authorities confirmed that life expectancy at birth had fallen significantly in just two years: from 78.8 years in 2019, it would be just 76.1 years in 2021.

The country has thus dropped to a level not reached since 1996. This is equivalent to erasing 26 years of progress.Life expectancy has declined in other parts of the world as a result of the pandemic, but the U.S. remains the developed country with the steepest decline — and the only one where this trend has not been reversed with the advent of vaccines. Most shocking of all: this decline is linked above all to an increase in violent deaths among the youngest members of the population.

Five-year-olds living in the U.S. have a one in 25 chance of dying before their 40th birthday, according to calculations by The Financial Times. For other developed countries, including France, this rate is closer to one in 100. Meanwhile, the life expectancy of a 75-year-old American differs little from that of other OECD countries.