For over a century, longer life has been medicine’s proudest achievement. In 1870 the average Briton lived to 43; today it is 82. In Saudi Arabia the leap is starker still: from 40 years in 1950 to nearly 79 today.
Now the demographic math is turning. By 2050 the number of adults over 65 will double to 1.6 billion, and the global support ratio will fall to just four working-age adults for every older one. But living longer is not the same as living well: too many spend their final years in poor health. The real prize of the longevity revolution is not lifespan. It is healthspan — the years lived in good health.
The case for optimism is getting stronger
The evidence is shifting the story. An International Monetary Fund study across 41 economies finds today’s older adults are physically and cognitively stronger than any generation before them — sharper on memory, grip strength, and lung function. Longer lives can also be more productive ones, with older workers boosting savings, output, and GDP.
That is what Javier Herrera of Kearney calls “productive longevity” in a recent op-ed for FII Institute. As the over-60s approach 2 billion by mid-century, the old three-stage life — learn, work, retire — is breaking down. Retirement gives way to a “contribution arc,” and older workers become an asset rather than a cost.
The billionaires are already all in
Follow the money, and it is pouring in from every direction. Russia’s government has reportedly pledged $26 billion to slow aging. Silicon Valley is more frenetic still: Jeff Bezos bankrolled Altos Labs and its record $3 billion launch; Sam Altman personally covered Retro Biosciences’ entire $180 million seed round; Larry Ellison has sunk more than $430 million into aging research; and Sergey Brin, Peter Thiel, and Vinod Khosla have each spread fortunes across the field. Bryan Johnson has gone furthest of all, turning his own body into a lab at $2 million a year.
Saudi Arabia sits closer to the center of this map than most realize. In one recent ranking of longevity’s 100 most influential figures, the Kingdom’s Hevolution Foundation placed second in the world — backing healthspan science at up to $1 billion a year, and credited with shifting the field’s own language from “longevity” to “healthspan.” Yet the race hides a paradox. When Johnson published what his millions had bought him, most of the advice was free: eat well, sleep enough, move often, avoid what harms you. The most powerful interventions are not exotic — they are the preventive basics that health systems still underfund. Which is exactly where the opportunity lies.
Every dollar invested returns more
The economics back the optimists. The Economic Case for Investing in Healthy Longevity, from FII Institute and the McKinsey Health Institute, tested more than 50 intervention scenarios across seven countries — and every one returned a profit. Median national ROI runs from 2.3x in Brazil to 6.0x in Saudi Arabia, in line with historical public-health returns.
Some results are eye-catching. Volunteer-matching for older Americans returns an estimated 24.3x, with 15.2 million willing volunteers going untapped. Fall-prevention home fixes — grab bars, railings, bathmats — return 7.2x in Saudi Arabia and 7.0x in Italy. Upskilling health workers returns 8.2x in China, where it could prevent 625,000 hospitalizations a year. And the world already has proof: Japan’s Silver Human Resource Centers keep seniors working, the Netherlands’ Hogeweyk reinvents dementia care, Zimbabwe’s Friendship Bench delivers community therapy. The models differ; the lessons travel.
Who pays for the longevity economy?
Capital at this scale needs a new structure. Herrera proposes a blended “capital stack”: sovereign wealth funds as anchors, whose long horizons match longevity’s multi-decade payoff, and private equity as the scaler, through platforms linking age-friendly housing, health tech, and reskilling. The Gulf, and Saudi Arabia especially, is positioned to pioneer the model and export it. Treated as a convergence of sectors rather than a fiscal burden, longevity becomes the century’s single greatest driver of GDP growth.
The next step: knowing which systems are ready
One question remains. Healthy longevity is, at heart, a prevention challenge — yet most systems are built to react, with OECD countries spending just 3% of health budgets on prevention. To close that gap, FII Institute and FTI Consulting have published Silent Systems, Loud Burden, the groundwork for a first-of-its-kind Preventive Health Readiness Index that measures whether health systems can actually deliver.
The question for leaders is no longer how we will pay for longer lives, but how we will invest to make sure they are lives worth living.
