On a hillside above Raches, one of Ikaria’s mountain villages, an elderly woman bends toward the scrubby ground. The sun has baked the earth dry, but oregano still pushes through the cracks. She cuts a handful, along with sprigs of sage and mountain tea, and tucks them into her apron. In her kitchen, bundles of herbs hang from rafters, drying in the warm air—the same way her grandmother stored them in the 1920s, long before electricity reached the island. Later she will brew them into a bitter infusion, amber in the glass, a ritual unchanged across generations.
Ikaria has long been mythologized as a place where people forget to die. Writers have lingered over photographs of spry centenarians tending gardens, couples in their nineties still dancing at weddings, afternoons that dissolve into siestas, evenings of wine and laughter. The island’s reputation as a “blue zone” has drawn anthropologists and health tourists alike, hoping to bottle the secret of longevity. Locals, for the most part, shrug. “We do what we have always done,” one villager told a visiting researcher, as if the world’s fascination were nothing more than a curious misunderstanding.
The dream of the hundred-year life, so often projected onto places like Ikaria, is fading. A study published this summer in the Proceedings of the National Academy of Sciences examined mortality records from twenty-three wealthy nations with low death rates. Using six different forecasting models, the researchers delivered a sobering conclusion: no generation born after 1939 is expected, on average, to live to one hundred years.
Between 1900 and 1938, life expectancy rose by an average of five and a half months with each new cohort. After 1939, the gain shrank to two and a half to three and a half months. The great climb of the early twentieth century has slowed into a plateau. “The unprecedented increase in life expectancy that followed early public-health breakthroughs appears to have been a one-off,” Héctor Pifarré i Arolas, one of the study’s authors, said in an interview. “It is unlikely to be repeated in the foreseeable future.”
From Miracles to Margins
At the start of the twentieth century, life in Greece was shaped by disease and loss. In the 1930s, infant mortality stood at more than 130 deaths per 1,000 live births. Malaria swept through villages every summer. Tuberculosis filled sanatoria in Athens. Diphtheria and measles stole children from families who expected such tragedies as part of life. Childbirth itself was dangerous: maternal mortality hovered near 400 deaths per 100,000 births. Average life expectancy barely reached fifty years.
By mid-century, however, survival had been transformed. Malaria was eradicated in the 1950s. Antibiotics, introduced in the postwar years, turned once-deadly infections into curable inconveniences. Vaccination campaigns against polio, diphtheria, and smallpox swept through schools. Public health measures—running water, sewage systems, rural electrification—altered daily life. By the 1960s, infant mortality had fallen to under 40 per 1,000. Today it is below 3. For families, the difference was seismic: grandparents who had buried multiple children lived to see their grandchildren grow up without fearing fever.
The demographic revolution was extraordinary, but it could only happen once. Once most children survived, gains in longevity depended on extending adulthood and old age. Safer roads, reductions in smoking, advances in cardiac care—all added time, but they yielded months rather than decades. A child born in 1920 could expect to live ten or fifteen years longer than her parents; a child born in 1980 might gain only two or three years over hers.
By the 1980s, life expectancy in countries such as Japan, France, and Greece had climbed into the eighties. Governments began designing pension systems around the assumption of steady, unbroken gains. Books and seminars promised the “hundred-year life.” The century became not just a dream but an expectation, reinforced by the upward slope of the mortality curve. The new study shatters that expectation.
Dreams of Immortality
The pandemic of 2019–21 made the fragility of progress visible. Global life expectancy fell by nearly two years in just three years—the sharpest drop in decades. In Greece, annual gains in life expectancy, which had averaged 0.16 years between 1990 and 2011, turned into a loss of more than half a year. Hospitals strained under waves of infections, routine care was postponed, chronic diseases worsened. The virus did not create the plateau, but it made its outlines clear.
Even as demographers warn of limits, another narrative thrives. In Silicon Valley, entrepreneurs submit to radical health regimens in the hope of halting or even reversing aging. One tech magnate swallows more than a hundred supplements daily and undergoes plasma transfusions from his teenage son, convinced that data and discipline can stop time. Venture capitalists speak of “solving” death as if it were a technical glitch. The culture treats mortality as another system to optimize.
The demographers’ findings offer a sobering rebuke. The spectacular gains of the early twentieth century were not the first steps on an exponential climb but a unique event: the one-time eradication of mass childhood death. “Human biology imposes limits,” says Jay Olshansky, a leading aging researcher. “We can push against them, but the idea of everyone living to one hundred is a mirage.”
The mythology of the blue zones complicates matters further. Ikaria, Sardinia, Okinawa—these regions are celebrated for their clusters of centenarians. Photographs of elders tending gardens or playing cards in cafés suggest the possibility of an ageless society. Yet the records are often inconsistent. In some places, pension fraud and faulty registries inflated the counts. Ikaria’s culture—its plant-based diet, modest physical labor, and communal ties—undoubtedly supports healthy aging, but younger generations no longer live the same way. Migration has hollowed out villages; supermarket food replaces gardens; evenings are spent in front of screens. The grandmother drying herbs may live to ninety. Her granddaughter, born in 1990, will likely not.
For governments, these shifts are not myths but numbers. Greece has announced plans to raise its retirement age after 2027, banking on continued gains. Pension systems across Europe rely on similar expectations. If those gains stall, the arithmetic falters. Health economists warn of a second risk: more years lived in poor health. A plateau does not only mean fewer centenarians; it may also mean longer stretches of illness and dependency. Families, already strained, will carry heavier burdens. The century-long life, once imagined as a universal entitlement, begins to look like a broken contract.
Public health experts argue that the focus must change. The goal should be health span rather than life span: the years lived free of serious disease, with dignity and purpose. A ninety-year-old who still walks to the market, tends her garden, and attends her grandchildren’s weddings may represent a greater triumph than a centenarian confined to a bed. In Greece, this distinction feels familiar. Old age has always been measured not only in years but in the ability to sit at the café, to laugh with neighbors, to dance at a festival.
The Horizon Ahead
Back in Raches, the woman ties her herbs with string and hangs the bundles from a beam. Outside, the sun sets behind the ridge, and the cicadas fade into the dusk. She does not think of mortality databases or actuarial curves. She thinks of tomorrow’s chores, of neighbors, of the tea she will sip in the afternoon.
The researchers’ charts settle into a horizon line. The steep ascent of the twentieth century has slowed, the curve flattened. The century is no longer ours. The question, then, is not whether we will live to one hundred, but how we will live in the years we are given.
