HISTORY · SCIENCE · TIME
How Many Weeks Did Humans Live in Different Historical Periods?
A visual journey from prehistory to the twenty-first century.
The history of humanity can also be told in weeks of life. Conditions for survival have changed dramatically: disease, infant mortality, and food shortages shaped lifespans for centuries; sanitation, vaccines, antibiotics, and public health later helped people live longer.
01Prehistory · from around 300,000 years ago
1. The first humans
Early Homo sapiens lived in environments where food availability, injuries, infections, and climate affected survival. Experiences varied across communities and millennia; there is no single reliable life-expectancy figure for all of prehistory.
02From around 10,000 BCE
2. The Neolithic Revolution
Farming and herding encouraged permanent settlements and transformed social organization. Settled life also changed exposure to disease and relationships with food. Health effects differed by place and period.
03From around 3500 BCE
3. The first civilizations
Egypt, Mesopotamia, and other civilizations developed cities, irrigation, trade, and administrative systems. Infection and childhood mortality still shaped survival, and available records cannot establish a comparable global figure.
04Around 500–323 BCE
4. Classical Greece
Classical Greece developed traditions of medical observation and reflection on the human body. But modern vaccines and effective treatments for many infections did not exist. Survival also depended on material and social conditions.
05From the first century BCE to the fifth century CE
5. Rome and the ancient world
Aqueducts, public baths, roads, and urban infrastructure helped organize life in many cities. They did not eliminate epidemics, inequality, or the limits of ancient medicine.
06Fifth–tenth centuries
6. The Early Middle Ages
In much of Europe, agriculture shaped daily life. Harvests, conflict, and disease could affect entire communities. Other world regions followed different paths, so a single figure should not be assigned to this period as a whole.
07Eleventh–fifteenth centuries
7. The High and Late Middle Ages
Cities and trade networks expanded in many regions. Food crises and epidemics also occurred. The Black Death in the fourteenth century caused enormous population loss across large parts of Eurasia and profoundly changed affected societies.
08Fifteenth–seventeenth centuries
8. The Renaissance and Early Modern Period
Anatomical knowledge, scientific observation, and the circulation of ideas advanced. Medicine still had limited ability to treat infections, and living conditions differed greatly across regions and social groups.
091700–1800
9. The eighteenth century
Around 1800, some historical reconstructions place global life expectancy at roughly 29 years. Infant mortality strongly influenced the measure: this does not mean most people died at that age.
101800–1900
10. The nineteenth century: industrialization
Industrialization transformed work and accelerated urban growth. In many cities, overcrowding and poor sanitation created serious health problems. Sanitary and scientific improvements arrived gradually and unevenly.
111900–2000
11. The twentieth century: a public-health revolution
Vaccination, antibiotics, sanitation, nutrition, and maternal and child health helped reduce many causes of premature death. Historical estimates put global life expectancy at about 32 years in 1900 and around 46–47 years by the mid-twentieth century.
122000–present
12. The twenty-first century: longer lives
In 2023, global life expectancy reached approximately 73.2 years. Important differences remain between countries and populations, but the figure reflects a remarkable change from earlier centuries.
TIME, MADE VISIBLE
From uncertainty to thousands of weeks
The history of longevity was not a steady progression: epidemics, famines, and setbacks occurred. Yet advances in food security, sanitation, medicine, and public health have reduced many causes of premature death. A grid of weeks makes this transformation visible and reminds us that lifespan is both a demographic reality and a personal experience.
Sources and methodology
Life-expectancy figures refer to population averages and vary by source, region, and year. Weeks are calculated by multiplying years by 52.18 and rounding. Ancient-period grids use illustrative scenarios and should not be interpreted as verified statistical estimates.
- Our World in Data — Life Expectancy
Historical series, methodology, and an explanation of life-expectancy differences.
- United Nations — World Population Prospects
United Nations demographic estimates and projections.
- Our World in Data — Causes of death
Historical context on mortality, public health, and causes of death.