World · snapshot 2026-09-07 22:36 UTC · data to 2025
World population and longevity
How fast is humanity growing and living longer, and is either trend changing?
World population was 8.22B people in 2025, up 0.9 percent over one year, a move at the 23rd percentile of its one-year changes.
Section 1 of 9
What changed?
AI narrative Modeled
World population reached 8215424893 people in 2025 [obs:137382], a 0.9 percent increase from 8140897523 in 2024 at the 23rd percentile of one-year changes [obs:137383]. Life expectancy at birth was 73.4818184164654 years in 2024 [obs:70501], up 0.151595 years from 2023 at the 3rd percentile of one-year moves [obs:70502]. Under-5 mortality fell to 37.4 deaths per 1,000 live births [obs:122450].
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World population
World population, World Bank.
8.22B people
2025
| Span | From | Change | Percentile |
|---|---|---|---|
| 1 period | 8.14B (2024) | 74.53M (+0.9%) | 23rd |
| 1 year | 8.14B (2024) | 74.53M (+0.9%) | 23rd of 64 |
| 5 years | 7.85B (2020) | 361.56M (+4.6%) | 10th of 60 |
| 10 years | 7.44B (2015) | 774.34M (+10.4%) | 25th of 55 |
Life expectancy at birth
Life expectancy at birth, world.
73.48 years
2024
| Span | From | Change | Percentile |
|---|---|---|---|
| 1 period | 73.33 (2023) | 0.1516 (+0.2%) | 3rd |
| 1 year | 73.33 (2023) | 0.1516 (+0.2%) | 3rd of 63 |
| 5 years | 72.87 (2019) | 0.6119 (+0.8%) | 3rd of 59 |
| 10 years | 71.78 (2014) | 1.71 (+2.4%) | 6th of 54 |
Under-5 mortality rate
Under-five mortality rate.
37.4 deaths per 1,000 live births
2024
| Span | From | Change | Percentile |
|---|---|---|---|
| 1 period | 38.3 (2023) | -0.9 (-2.3%) | 23rd |
| 1 year | 38.3 (2023) | -0.9 (-2.3%) | 23rd of 33 |
| 5 years | 39.6 (2019) | -2.2 (-5.6%) | 10th of 29 |
| 10 years | 43.9 (2014) | -6.5 (-14.8%) | 0th of 24 |
Section 2 of 9
How unusual is it?
AI narrative Modeled
Latest world population sits at the 100th percentile of its series history, an all-time high [obs:137383], with the one-year change at the 23rd percentile and robust z of -1.1295; one period since a larger move [obs:137383].
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- Latest value percentile
- 100th of 65 values
- Latest change percentile
- 23rd of 64 changes
- Robust z of latest change
- -1.13
- Largest move
- 1 period since a larger move
- Record level
- all-time high in the stored series
- Previous comparable move
- 2024: 77.97M people (obs 137383, 137384)
- Prior maximum
- 8.14B (2024, obs 137383)
- Prior minimum
- 3.02B (1960, obs 137447)
Section 3 of 9
Why might it be happening?
AI narrative Modeled
Documented mechanisms: none stored. Statistical model drivers for life expectancy include y[t-0] at -0.022498974073318655 years, y[t-1] at -0.01911578955292175 years, world-population at -0.012911957463278329 years, cereal-yield at -0.017243534979863376 years and electricity-access at -0.016162772258228646 years [forecast:941623c9-70a5-400f-b5a4-381081987311]. Hypotheses: electricity system enables human health and longevity [rel:f913d900-026e-4232-b9aa-a617096de9f8]. Unknowns: population figures beyond latest census round are estimates revised on each release; cause-of-death composition not stored.
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Documented mechanisms
No mechanism in the mechanisms table is linked to this topic yet.
Model-supported drivers
- life-expectancy:WLD:1: y[t-0] lag 1, contribution -0.0225 years (statistical association, not causal)
- life-expectancy:WLD:1: y[t-1] lag 2, contribution -0.0191 years (statistical association, not causal)
- life-expectancy:WLD:1: world-population lag 1, contribution -0.0129 years (statistical association, not causal)
- life-expectancy:WLD:1: cereal-yield lag 1, contribution -0.0172 years (statistical association, not causal)
- life-expectancy:WLD:1: electricity-access lag 1, contribution -0.0162 years (statistical association, not causal)
Hypotheses
- Electricity system enables Human health and longevity Hypothesized
Stated, not yet evidenced here: electricity access allows refrigeration of vaccines and food, lighting in clinics, water pumping and a shift away from solid cooking fuels, all of which bear on mortality. The catalog carries both series; no study is attached.
Unknowns
- Population figures beyond the latest census round are estimates revised on each release.
- Cause-of-death composition is not stored, so the driver of life-expectancy changes cannot be read from the site's data.
Section 4 of 9
What has not changed?
AI narrative Modeled
Population with access to electricity at 91.9264843853681 percent in 2024 lies inside the 10th to 90th percentile band of past changes [obs:28425]. Population using the Internet at 73.6 percent [obs:61266] and GDP per person at 12130.6633214662 constant 2015 US$ [obs:38095] remain inside their historical bands.
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| Series | Latest | Basis | Normal band (p10 to p90) | Historical range | Reading |
|---|---|---|---|---|---|
| Population with access to electricity Observed Share of people with electricity. | 91.93 percent of population 2024, obs 28425 | year-over-year change 0.323 (+0.4%) 25 past changes | 0.2347 to 1.13 | 73.2 (1998) to 91.93 (2024) since 1998; latest at the 100th percentile of levels | within its normal band |
| Population using the Internet Observed Share of people using the internet. | 73.6 percent of population 2025, obs 61266 | year-over-year change 2.4 (+3.4%) 19 past changes | 2 to 3.86 | 15.6 (2005) to 73.6 (2025) since 2005; latest at the 100th percentile of levels | within its normal band |
| GDP per person, constant 2015 US$ Observed GDP per person. | 12,130.66 constant 2015 US$ per person 2025, obs 38095 | year-over-year change 236.41 (+2.0%) 64 past changes | 3.39 to 239.44 | 3,666.59 (1960) to 12,130.66 (2025) since 1960; latest at the 100th percentile of levels | within its normal band |
Section 5 of 9
What absorbs the shock?
AI narrative Modeled
Renewable freshwater resources per person recorded at 5392.94445818055 cubic metres [obs:107865] and dietary energy supply at 3026 kcal per person per day [obs:299878]. Financing, substitution and demand elasticity are not measured.
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5,392.94 cubic metres per person per year · 2022 · yoy -0.7% · obs 107865
Renewable freshwater per person.
Dietary energy supply per person
3,026 kcal per person per day · 2024 · yoy +0.3% · obs 299878
Calories available above requirement is the food buffer.
Not measured
No stored series evidences this buffer.
Health spending per person is not ingested.
Not measured
No stored series evidences this buffer.
Not measured
No stored series evidences this buffer.
Section 6 of 9
What response is underway?
AI narrative Modeled
Researchers per million people reached 1651.5851690472 in 2020, up 8.4 percent year over year [obs:118861]. R&D expenditure as share of GDP was 2.59737836465431 percent in 2023, up 1 percent year over year [obs:102615].
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| Group | Series | Latest | Year earlier | Change |
|---|---|---|---|---|
| Workforce | Researchers per million people Observed | 1,651.59 researchers per million people (2020, obs 118861) | 1,523.82 (2018) | 127.77 (+8.4%) |
| Capital spending | R&D expenditure as share of GDP Observed | 2.6 percent of GDP (2023, obs 102615) | 2.57 (2022) | 0.0262 (+1.0%) |
The US pipeline and response measures are on the capacity page; bottleneck assessments are on bottlenecks.
Section 7 of 9
Scenarios
AI narrative Modeled
Life expectancy base case 73.68736514642508 years for 2025 with 80 percent interval 72.83703079641073 to 73.83145889482464 [forecast:941623c9-70a5-400f-b5a4-381081987311]; 5-year base 75.04777201603169 years for 2029 [forecast:06f96eb4-f2ff-498d-b672-b3cb4735da95]. World population base case 8291408073.60397 people for 2026 [forecast:636f8078-462d-4674-8a14-456ce86b00e3]; 5-year base 8601609314.454004 for 2030 [forecast:40a65470-2795-4e83-8396-d0c1422c8022]. Each carries falsifiers based on first published values.
Written by grok-4.3 over the numbers in this snapshot only, validated against them (every figure and cited id had to be in the snapshot), run f7defeb3, prompt 1.0.0. It adds no facts.
Life expectancy at birth
Base case
73.69 years
The point estimate: the model's central path.
Upside
73.83 years
Upper bound of the interval: what would need to go better than the central path.
Downside
72.84 years
Lower bound of the interval: what would need to go worse than the central path.
The model assigns 80 percent to the interval; the site assigns no other probability.
Falsifiers and assumptions
- If the first published value of life-expectancy (WLD) for 2025 is below 72.84 years or above 73.83 years, the 80 percent interval is falsified.
- The model assigns a 10 percent probability to a value below 72.84 years and a 10 percent probability to a value above 73.83 years; interval misses should occur about one time in five over many forecasts, and a run of misses well above that rate falsifies the calibration.
- The point forecast is above the last observed value (73.48 years); a realised value at or below that level falsifies the direction call.
- Assumption: No structural break in life-expectancy between the data cutoff and the target period.
- Assumption: The source keeps publishing the series on the same definition; a rebasing or redefinition invalidates the comparison.
- Assumption: The lagged statistical associations estimated in the training window hold over the horizon.
- Assumption: Driver series used, lagged: world-population, cereal-yield, electricity-access. Their own future values are not forecast; only values known at the cutoff enter.
Life expectancy at birth
Base case
75.05 years
The point estimate: the model's central path.
Upside
75.05 years
Upper bound of the interval: what would need to go better than the central path.
Downside
74.24 years
Lower bound of the interval: what would need to go worse than the central path.
The model assigns 80 percent to the interval; the site assigns no other probability.
Falsifiers and assumptions
- If the first published value of life-expectancy (WLD) for 2029 is below 74.24 years or above 75.05 years, the 80 percent interval is falsified.
- The model assigns a 10 percent probability to a value below 74.24 years and a 10 percent probability to a value above 75.05 years; interval misses should occur about one time in five over many forecasts, and a run of misses well above that rate falsifies the calibration.
- The point forecast is above the last observed value (73.48 years); a realised value at or below that level falsifies the direction call.
- Assumption: No structural break in life-expectancy between the data cutoff and the target period.
- Assumption: The source keeps publishing the series on the same definition; a rebasing or redefinition invalidates the comparison.
- Assumption: The smoothed level and trend at the cutoff persist over the horizon.
World population
Base case
8.29B people
The point estimate: the model's central path.
Upside
8.29B people
Upper bound of the interval: what would need to go better than the central path.
Downside
8.29B people
Lower bound of the interval: what would need to go worse than the central path.
The model assigns 80 percent to the interval; the site assigns no other probability.
Falsifiers and assumptions
- If the first published value of world-population (WLD) for 2026 is below 8,285,853,010 people or above 8,294,904,994 people, the 80 percent interval is falsified.
- The model assigns a 10 percent probability to a value below 8,285,853,010 people and a 10 percent probability to a value above 8,294,904,994 people; interval misses should occur about one time in five over many forecasts, and a run of misses well above that rate falsifies the calibration.
- The point forecast is above the last observed value (8,215,424,893 people); a realised value at or below that level falsifies the direction call.
- Assumption: No structural break in world-population between the data cutoff and the target period.
- Assumption: The source keeps publishing the series on the same definition; a rebasing or redefinition invalidates the comparison.
- Assumption: The smoothed level and trend at the cutoff persist over the horizon.
World population
Base case
8.6B people
The point estimate: the model's central path.
Upside
8.6B people
Upper bound of the interval: what would need to go better than the central path.
Downside
8.54B people
Lower bound of the interval: what would need to go worse than the central path.
The model assigns 80 percent to the interval; the site assigns no other probability.
Falsifiers and assumptions
- If the first published value of world-population (WLD) for 2030 is below 8,536,707,706 people or above 8,601,609,314 people, the 80 percent interval is falsified.
- The model assigns a 10 percent probability to a value below 8,536,707,706 people and a 10 percent probability to a value above 8,601,609,314 people; interval misses should occur about one time in five over many forecasts, and a run of misses well above that rate falsifies the calibration.
- The point forecast is above the last observed value (8,215,424,893 people); a realised value at or below that level falsifies the direction call.
- Assumption: No structural break in world-population between the data cutoff and the target period.
- Assumption: The source keeps publishing the series on the same definition; a rebasing or redefinition invalidates the comparison.
- Assumption: The smoothed level and trend at the cutoff persist over the horizon.
Section 8 of 9
What to watch
AI narrative Modeled
Life expectancy at 73.4818184164654 years with 0.2067 percent year-over-year change against threshold 0, status easing [obs:70501]. Under-5 mortality at 37.4 deaths per 1,000 live births with -2.3499 percent change, status easing [obs:122450]. World population growth at 0.9155 percent against 0.5 threshold, status easing [obs:137382].
Written by grok-4.3 over the numbers in this snapshot only, validated against them (every figure and cited id had to be in the snapshot), run f7defeb3, prompt 1.0.0. It adds no facts.
On the easing side of the threshold · rising confirms easing
Life expectancy rising year over year is the direct measure of longevity progress.
On the easing side of the threshold · falling confirms easing
Under-five mortality falling is the fastest-moving component of longevity gains.
On the easing side of the threshold · rising confirms easing
Growth below half a percent a year marks the transition to a slower-growing world.
Section 9 of 9
Forecast track record
AI narrative Modeled
World population 1-year champion holt backtest MAE 3458248.583545208 over 16 cutoffs, 80 percent interval coverage 50 percent, skill versus last value 96 percent; 5-year MAE 35742299.808268465, coverage 50 percent, skill 91 percent. Life expectancy 1-year champion ridge MAE 0.27487920052664006 over 16 cutoffs, coverage 56 percent, skill 35 percent; 5-year MAE 0.5216344115896376, coverage 8 percent, skill 47 percent. No live evaluations yet.
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| Forecast | Champion | Backtest MAE | Skill vs last value | 80% coverage | Live evaluations |
|---|---|---|---|---|---|
| world-population:WLD:1 | holt | 3.46M over 16 cutoffs | +96% | +50% | none yet |
| world-population:WLD:5 | holt | 35.74M over 12 cutoffs | +91% | +50% | none yet |
| life-expectancy:WLD:1 | ridge | 0.2749 over 16 cutoffs | +35% | +56% | none yet |
| life-expectancy:WLD:5 | holt | 0.5216 over 12 cutoffs | +47% | +8% | none yet |
The full scorecard is at /forecasts/scorecard.
Provenance
- Snapshot
- 6 · 2026-09-07 22:36 UTC · navigator_view_v1+navigator_topics_v1
- Gaps stated
- 0
- AI narrative
- grok-4.3, run f7defeb3-eaef-4479-8dfc-069473d7c5ac, prompt 1.0.0, 17 ids cited
- Earlier snapshots
- none
Every value on this page is a stored observation (obs ids shown), a forecast record, a mechanism or a relationship row, or a percentile computed from those the same way the relevance engine computes its features. Series the config references but the site does not store are listed as gaps under their section, never filled in.