We rate countries by GDP. By PISA scores. By graduation rates.
We should rate them by how long their teachers live.
The Teacher Lifespan Index is a new framework for evaluating education systems — not by what they produce, but by what they cost the humans who deliver them. Because a system that destroys its teachers cannot, in the long run, serve its students.
The Question That Changes Everything
"Does your country's education system
increase or shorten your life span?"
Corporate America has been asked this question for decades. The Whitehall Studies (1978–2004) proved that low-autonomy, high-demand work environments produce measurably shorter lives — regardless of salary. Teaching is the educational equivalent of the lowest-autonomy Whitehall job. The data is in. The question is whether we are willing to hear the answer.
Teaching in this country adds years to your life. The system is biologically aligned with human flourishing.
Teaching in this country is broadly sustainable. The biological cost is manageable. Improvement is possible.
Teaching in this country neither clearly adds nor subtracts years. Significant risk factors are present and growing.
Teaching in this country is shortening lives. The biological cost is measurable and documented.
Teaching in this country is destroying lives. The system is in biological crisis. Urgent systemic intervention is required.
Click any country for the full biological verdict.
Teaching in Finland adds years to your life.
Teaching in New Zealand is broadly sustainable.
Teaching in Canada is broadly sustainable, with regional variation.
Teaching in Japan is biologically costly. The system is consuming its teachers.
Teaching in the UK is shortening lives. The OFSTED system is a biological threat.
Teaching in America is shortening lives. The system is a biological threat at scale.
Teaching in South Korea is destroying lives. The highest PISA scores in the world. The highest teacher suicide rate in the OECD. This is the biological verdict on FIDUROD at its extreme.
South Korea is the most precise proof that academic performance metrics and teacher biological health are not the same thing. They can be directly opposed. A system can be simultaneously excellent by one measure and catastrophic by another.
Teacher suicides in 5 years
South Korea Ministry of Education
Births per woman (2023) — world's lowest
OECD 2023
Teachers marched in Seoul in 2023 demanding protection
Reuters, 2023
"South Korea is a country with the highest rate of suicide in the OECD and the lowest birthrate in the world. Such an irony for a country that prides itself on its education system."
Each element of FIDUROD has a documented biological pathway to shortened lifespan. This is not metaphor. This is cellular biology.
The Teacher Lifespan Index is a composite framework. No single country has published a definitive "teacher life expectancy" figure — because no government has wanted to. This index synthesises the available proxy data.
The absence of a definitive "teacher life expectancy" dataset is itself a finding. No government has commissioned this research. The Teacher Lifespan Index is TeacherWorld's call for that research to be conducted — and for the results to be published, regardless of what they reveal. The Colombian study (PLoS ONE, 2026) finding a 15% higher mortality risk among teachers is the first peer-reviewed study of its kind. It will not be the last.
Share this index with a parent. Share it with a school board member. Share it with a politician who claims to care about education. Ask them: if your education system were rated by how long its teachers live, would you be proud of the score?