January 2011. When it was just us two and our firstborn daughter, Esther.
We were just kids figuring out life. Fifteen years of life, seven kids, and a lot of hard-won wisdom later, we are both in our forties, and that puts things in perspective fast.
The calendar says we are in the back half. But what does God say about how long this body was actually designed to last?
That question is exactly what this article is about.
We were taught the lie, too.
Sometime around middle school, most of us were handed the same story: average life expectancy in the ancient world was about thirty years, modern medicine more than doubled it, and we should all be grateful we weren’t born back then.
But that story carries a spiritual implication almost nobody says out loud.
If ancient people naturally died at thirty, then the God-designed body must have been fundamentally defective. If modern medicine rescued us from that defect, then aging must be a medical problem first, not a design to be stewarded.
And if that is true, then the natural state of a sixty-year-old is sickness, decline, and dependence on a pharmaceutical scaffold just to keep going.
That belief is not a small error. It is upstream of almost every modern health lie.
Because once you believe your body was never designed to last, you stop asking what God built into it. You stop asking what food, sleep, movement, sunlight, clean air, clean water, and obedience were meant to do.
You stop seeing aging as something to honor and steward, and start seeing it as a defect to manage.
Then we ran the math. We read Psalm 90 with new eyes.
The whole story fell apart, and the way it fell apart became the foundation for how we think about aging, longevity, and the body God gave you.
“The years of our life are seventy, or even by reason of strength eighty; yet their span is but toil and trouble; they are soon gone, and we fly away.” — Psalm 90:10
Moses wrote that thousands of years before antibiotics, blood pressure medication, statins, joint replacements, and modern longevity clinics. Seventy to eighty was not a pharmaceutical achievement.
It was the Biblical baseline.
So if people in the ancient world really died at thirty, the historical record has a lot of explaining to do, because the ancient world is full of named men and women who lived deep into their seventies, eighties, and nineties.
The textbook said one thing. Scripture said another.
We checked the math, and Scripture won.
The Math Nobody Showed You
The number you were taught, the average life expectancy of about thirty years for the ancient world, has nothing to do with how long adults lived. It’s a statistical artifact created by averaging together infants who died before their first birthday with adults who lived into their seventies.
When one out of every three or four children died before age five, the average gets crushed downward in a way that has very little to do with how long an adult human being could expect to live in that era.
Ancient lifespan data is a statistical artifact created by averaging together infants who died before their first birthday with adults who lived into their seventies.
Read the same data using the right column instead of the wrong one and a completely different picture emerges. The classic Frier life table for the Roman Empire shows that a Roman who survived to age fifteen could expect to live to about forty-six, nearly double the life expectancy at birth, and about one in four fifteen-year-olds went on to reach sixty.
Tim Parkin’s foundational work on Roman demography and more recent demographic syntheses confirm the same pattern: average life expectancy at birth in the Roman Empire sat in the twenties to early thirties, but many adults who survived childhood lived into their sixties and seventies.
The data is even cleaner when we look at populations untouched by modern medicine. Anthropologists Michael Gurven and Hillard Kaplan studied life expectancy across modern hunter-gatherer and forager populations, including the Hadza of Tanzania and the Tsimane of the Bolivian Amazon.
Their headline finding, published in 2007 in Population and Development Review, found that the most common age of adult death sits at about seventy-two years, with a range of sixty-eight to seventy-eight across the populations studied, no pharmaceuticals, no statins, no blood pressure medication, just a body designed by God, given clean food and clean water and a reasonably benign environment, doing exactly what it was built to do.
They Were Always Living to Seventy and Eighty
The named figures from the ancient world all tell the same story. Plato died at about eighty.
Sophocles wrote his last play after he turned ninety. Hippocrates lived somewhere between eighty-three and ninety, depending on which biographer you trust.
Anna the prophetess in Luke 2 was at least eighty-four when she met the Christ child, and the text says it that way to mark her as old:
And there was a prophetess, Anna, the daughter of Phanuel, of the tribe of Asher. She was advanced in years, having lived with her husband seven years from when she was a virgin, and then as a widow until she was eighty-four. — Luke 2:36-37
These are not exotic outliers. Across the ancient Mediterranean, anyone who survived the dangerous early years of childhood and the dangerous years of childbirth could expect a long life if disease, accident, and violence did not intervene.
Caleb told Joshua at eighty-five:
I am still as strong today as I was in the day that Moses sent me; my strength now is as my strength was then, for war and for going and coming. — Joshua 14:11
He was speaking not as the exception but as the model. Moses himself lived to one hundred and twenty, with eyes that were not dim and natural force unabated.
Aaron made it to one hundred and twenty-three. Joshua died at one hundred and ten.
The Biblical record is dense with adults who finished their lives in strength and clarity, well past the age where a modern American would be on five prescriptions just to stay vertical.
“I’m grateful to be here, receiving encouragement, recipes, and whole-body transformation. Even after trying times, I trust you and Mama Z. The spiritual aspect completes the system: body, soul, and spirit.”
— Ellen D.
Psalm 90 Has Been Telling Us Since Moses
About three thousand four hundred years ago, Moses sat down in the wilderness and wrote a Psalm about the brevity of human life. He set the baseline at seventy years, eighty if our strength held:
The years of our life are seventy, or even by reason of strength eighty; yet their span is but toil and trouble; they are soon gone, and we fly away. — Psalm 90:10
This verse is descriptive, not aspirational. Moses is not casting a vision of what might one day be possible if humans got their act together.
He is naming the standard built into our design, the number God set, the number any healthy adult could expect to reach if they survived childhood and walked in obedience.
Conservative commentators across the Hebrew tradition have read it the same way for centuries: seventy is the baseline, eighty the upper register, and the rest is by extraordinary grace.
The data agrees with the verse. Gurven and Kaplan’s 2007 cross-cultural analysis of modern hunter-gatherer populations put the most common age of adult death at about seventy-two years, with a range of sixty-eight to seventy-eight.
Three thousand four hundred years between Moses and the anthropologists, and the number is essentially the same.
What Modern Medicine Actually Did
Here is where the story gets honest.
Modern medicine did make a real and measurable contribution to human life expectancy, but almost entirely on one end of the curve:
Clean water and sewer systems saved millions of lives.
Basic sanitation, including hand washing, radically reduced deaths from infection.
In maternity wards, Semmelweis’s handwashing reform helped drop maternal death rates from about 12% to 1% in two years.
Clean water and sewer systems were responsible for about 43% of the total mortality decline in major American cities during 1900-1936.
Clean water accounted for about three-quarters of the drop in infant mortality.
Clean water accounted for nearly two-thirds of the drop in child mortality.
Antibiotics drove another major collapse in infectious disease mortality in the 1940s.
Antibiotics are credited with adding roughly 5 to 10 years to American life expectancy at birth.
Infectious disease mortality dropped 8.2% per year from 1938 to 1952.
These were enormous wins, but notice where the gains happened:
Modern medicine saved babies.
Modern medicine saved children.
Modern medicine saved mothers in childbirth.
Modern medicine reduced infectious disease deaths.
Modern medicine raised the average.
Modern medicine did not radically extend the natural ceiling of adult human life.
These were enormous wins, and we won’t pretend they weren’t.
But notice what those wins didn’t do. They didn’t extend the natural ceiling of adult human life.
They crashed childhood mortality, which raised the average. They didn’t make a sixty-year-old live to ninety.
The actual numbers are clear on this point: a sixty-five-year-old American man in 1900 could expect about 11.5 more years of life, and by 2020 that number had moved to roughly 17 years. That’s a real gain, and we’ll name it.
But it’s a gain of about five and a half years across more than a century of pharmaceutical and surgical innovation, while life expectancy at birth rose by about thirty years across the same window.
That jump came mostly from saving the babies. The Biblical baseline for adults has barely moved.
“Thank you so much for everything you all do, and especially today for the Scriptures. I really needed those today.”
— Mary G.
The Healthspan Reversal
Here is the part of the story almost nobody tells. While modern medicine added a handful of years to adult life expectancy, it added many more years to the unhealthy part of adult life.
The United States now carries the largest healthspan-lifespan gap of any nation studied, sitting at about 12.4 years, with women carrying a 13.7-year gap. That number is the years lived with chronic disease, disability, or significant functional decline before death.
The same pattern holds globally, but the American version is the worst in the developed world.
Twelve years. That is the difference between dying functional and dying medicated, and that is the difference between Caleb at eighty-five with strength to fight and the average modern eighty-five-year-old on a stack of prescriptions to manage what should never have been there to manage.
The ancient adults who reached seventy generally died doing the work they had always done.
The modern adult who reaches seventy spends, on average, a decade or more in declining function while pharmaceuticals manage chronic conditions that were largely created by the way we eat, sleep, move, and live.
We saw this with Mama Z’s dad, who slipped into advanced frontal lobe dementia in his mid-70s. We are walking you through that whole season as a family, and there was a healing version of growing old that we weren’t getting access to inside the system.
This is the part that should be making us angry, but in a useful way. Not at the doctors who serve faithfully inside a broken system, and not at the science either.
The anger belongs to the lie that told you the modern medical complex extended your adult life, when what it really did was give you more years to live with the chronic illness the modern food and chemical complex created in the first place.
The Lie Is Upstream of Every Other Health Lie
If you believe modern medicine extended adult human life from forty to eighty, you believe your body needs a pharmaceutical scaffold to last. You believe the natural state of a sixty-year-old is sick, and the medicated state is the only path to functional.
You believe the church should send its members to the same chronic disease management complex as everyone else and call that wisdom.
That belief is the lie upstream of every other health lie. It’s the foundation under the assumption that your aging is a defect to be managed, not a design to be honored.
The textbook said one thing and Scripture said another. We checked the math, and Scripture won.
Test everything; hold fast what is good. — 1 Thessalonians 5:21
Once we saw it for what it was, the rest of the work became simple, and became the basis for this entire Bible Health publication.
We’re so grateful that you were part of this journey with us. <3
A Prayer for You. 🙏
Almighty God, thank You for every day You have given me and for the days still ahead.
Teach me to number my days, so I may gain a heart of wisdom.
Give me strength and vitality for the years You have planned for me, and the wisdom to care for my body as a gift from You.
Let my life bear fruit in every season, so the generations after me see Your faithfulness.
Amen.
Upgrade and learn what God’s Word says about every area of life
and how to live it. That’s what Bible Health is all about.
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Follow Jesus, not trends, in every area.
As always, our hope and prayer is that you experience the abundant life.
~ Dr. Z & Mama Z
References
https://en.wikipedia.org/wiki/Demography_of_the_Roman_Empire
https://journals.sagepub.com/doi/pdf/10.1177/0142064X241249809
https://ourworldindata.org/grapher/life-expectancy-at-different-ages
https://www.biblestudytools.com/commentaries/treasury-of-david/psalms-90-10.html
https://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S1010-99192015000200014
https://cepr.org/voxeu/columns/two-hundred-years-health-and-medical-care
https://scholar.harvard.edu/files/cutler/files/cutler_miller_cities.pdf
My great grandmother was in her 90s when I was little. Still strong. Still going. I was blessed to have been born in a different country and I’ve never believed the lies told here in the United States. 15 years ago doctors told me I would die within 3 to 5 years. I didn’t believe them either. Unluckily, I do have a lot of health issues and have not found where to start to resolve them. But I still trust in our Lord and His healing, from His creation and from His miracles. Praise the Lord! Praise the Lord!