# The world in 2122

My best prediction is a world of **about 9.7 billion people**, slowly shrinking and much older; **roughly 88 percent urban**; almost completely electrified; deeply integrated with artificial intelligence and robotics; materially richer but still unequal; and permanently altered by about **2.2°C of global warming**. Nation-states remain powerful, no single country dominates, and humanity has adapted to climate change rather than fully reversing it.

This forecast begins from a 2026 world in which the UN expects population to peak near 10.3 billion in the 2080s, electrification and renewable deployment are accelerating, one-quarter of new cars are already electric, AI capabilities and adoption are advancing rapidly, and current climate pledges still point toward warming well above 2°C. ([United Nations][1])

## Population and where people live

The global population peaks around 2085 and declines to approximately **9.7 billion by 2122**. The decline is gradual rather than catastrophic: births remain below replacement level in most societies, but longer lives and population momentum prevent a rapid fall.

The geographical distribution has changed dramatically:

* **Africa:** about 4.0 billion people
* **Asia:** about 4.1 billion
* **The Americas:** about 1.0 billion
* **Europe:** about 500 million
* **Oceania:** about 70 million

Africa is therefore home to more than two people in every five. Nigeria, the Democratic Republic of the Congo, Ethiopia, Tanzania and several other African countries are among the largest states by population. India remains enormous but is shrinking, while China, Japan, Korea and much of Europe have substantially smaller and older populations than in 2026. The demographic center of humanity lies somewhere between East Africa, the Indian Ocean and South Asia. The UN already projects the world population to peak before 2100, rapid growth to continue longest in sub-Saharan Africa and the number of people aged 65 or older to surpass the number of children by the late 2070s. ([United Nations][2])

About **one-quarter of humanity is over 65**, and the global median age is close to 47. Families are small, first-time parents are older, and societies are organized around supporting both children and very long-lived adults. Immigration is the principal means by which many colder, older countries maintain their workforces and cities.

Roughly **88 percent of people live in cities, towns or continuous metropolitan corridors**. Most do not inhabit science-fiction towers. They live in dense, mid-rise districts with apartments, schools, clinics, automated shops, trees, shaded streets and rapid transit. Cities are more polycentric: a metropolitan region may contain 20 formerly separate cities linked by rail and continuous development.

The greatest urban expansion has occurred in African and South Asian corridors such as the Gulf of Guinea, the East African highlands, the Great Lakes region, the Nile basin and the Indian subcontinent. Climate migration has also favored the North American Great Lakes, southern Canada, northern Europe, Patagonia, elevated tropical regions and parts of Siberia.

Low-lying coastal land has not been completely abandoned, but settlement has become selective. The richest and most strategically important districts of cities such as New York, Shanghai, Mumbai, Lagos and Rotterdam stand behind immense systems of barriers, pumps, artificial wetlands and raised infrastructure. Less valuable coastlines have undergone managed retreat. Several low-island states retain sovereignty, maritime rights and national institutions even though much of their population lives abroad.

## Transportation

Urban transport is predominantly **autonomous, electric and shared**. A person summons a small vehicle, joins an automated bus or boards a metro without consulting a timetable. Traffic lights are uncommon because vehicles and roads negotiate movement continuously. Human driving on public roads requires a special license and is largely recreational.

Private vehicle ownership survives in rural areas and among wealthy enthusiasts, but most urban residents purchase mobility as a service. Because vehicles are lighter, coordinated and rarely parked, cities have converted much of their former parking and road space into housing, greenery and pedestrian areas. Road deaths have fallen by roughly 90 percent from early-21st-century rates.

High-speed electric rail carries most passenger traffic between cities separated by less than about 1,500 kilometres. Ordinary high-speed trains travel at 350–450 kilometres per hour, while a few heavily used enclosed routes reach 600 kilometres per hour. Vacuum-tube transport exists experimentally but never became a normal global system: conventional rail proved cheaper, safer and sufficiently fast.

Freight moves through automated railways, electric trucks and robotic distribution hubs. Many major roads supply power inductively or through overhead systems, reducing the size of truck batteries. Ports operate continuously with almost no human presence on loading areas.

Aircraft remain important. Short regional flights use batteries, hydrogen or hybrid systems; long-haul aircraft burn synthetic hydrocarbons manufactured from clean hydrogen and captured carbon. Liquid hydrogen serves some high-volume routes, but cryogenic storage prevents it from becoming universal. Supersonic passenger aircraft exist, although they remain expensive. Suborbital flights can cross the world in an hour or two but are a luxury rather than mass transportation. Aviation’s present net-zero target and the rapid electrification of road transport point toward this division between direct electrification and synthetic fuels. ([icao.int][3])

Ocean shipping is almost entirely autonomous. Large vessels use ammonia, methanol, hydrogen-derived fuels, wind assistance and, in a minority of cases, compact nuclear reactors. Crews supervise fleets from land, boarding ships mainly for repairs and emergencies.

Travel to orbit is routine enough for industry, science and wealthy tourists. Permanent settlements exist on the Moon and perhaps Mars, but together they contain far fewer than one million people. Space has become economically useful without becoming an escape from Earth.

## Energy

Electricity supplies approximately **80 percent of final useful energy**, directly or through hydrogen and synthetic fuels. Global electricity production is three to four times its 2026 level, even though devices are considerably more efficient.

A plausible 2122 electricity mix is:

* **45 percent solar**
* **25 percent wind**
* **12 percent nuclear fission**
* **6 percent nuclear fusion**
* **10 percent hydroelectric, geothermal, tidal and other renewables**
* **2 percent combustion**, normally using renewable or captured-carbon fuels

Fusion power is real but not dominant. It is valuable for dense industrial regions, spacecraft propulsion research and places with poor renewable resources. It never beats solar energy everywhere because solar modules, storage and transmission continue becoming extraordinarily cheap.

Power systems combine continent-scale high-voltage grids with local microgrids. Electricity crosses time zones to follow sunlight and wind. Buildings, vehicles, industrial heat stores, batteries, reservoirs and hydrogen caverns collectively balance the system. A neighbourhood can disconnect from the main grid for weeks after a storm.

Fossil fuels are no longer significant energy commodities. Small quantities of petroleum and methane are extracted as chemical feedstocks or emergency reserves, with their carbon captured. Former oil powers have either diversified into electricity, materials, desalination, finance and logistics or become substantially less influential.

Humanity removes around **five billion tonnes of carbon dioxide annually** through reforestation, soil management, mineralization, biomass systems and direct-air capture. This is an enormous industry, comparable in physical scale to the early-21st-century oil sector. It compensates for aviation, agriculture and other residual emissions and slowly reduces the atmospheric carbon accumulated in the previous two centuries. In 2026, electricity demand was already growing faster than total energy use, renewables led new supply, nuclear construction was reviving and grid investment was becoming the main constraint—foundations for this eventual system. ([iea.org][4])

## Medicine and human longevity

Global life expectancy at birth is about **92 years**. In the healthiest and richest societies it is around 100, while poorer or politically unstable regions average in the mid-80s. Average healthy life expectancy is approximately 85.

Living to 105 is unremarkable. A substantial minority reaches 115, and verified lifespans occasionally approach 130. There is no immortality and no reliable procedure that repeatedly returns an elderly body to youth. Instead, ageing has become partially treatable: medicine slows several mechanisms of cellular deterioration, repairs particular tissues and postpones the diseases that once arrived together in old age.

A typical person receives genomic and metabolic screening at birth. During life, unobtrusive sensors monitor blood chemistry, cardiac function, immune changes, sleep and early signs of cancer. An AI medical system notices abnormal patterns months or years before symptoms and orders a confirmatory test. Doctors remain responsible for difficult decisions, invasive care, consent and communication, but machines conduct most routine diagnosis.

Most single-gene disorders can be corrected through somatic genome editing. Embryo editing is legally restricted and uncommon, used mainly to prevent severe inherited diseases rather than to select appearance or intelligence. By 2026, regulators had already approved CRISPR-based treatments and dozens of cell and gene therapies, while gene-edited animal organs were entering formal clinical study. ([U.S. Food and Drug Administration][5])

Replacement organs are grown from a patient’s cells, assembled from engineered tissues or taken from extensively modified animals. Waiting lists for kidneys, hearts and livers have largely disappeared. Artificial blood, immune cells and temporary mechanical organs keep patients alive while biological replacements are prepared.

Cancer is not eliminated, but most tumors are detected extremely early and destroyed with individualized vaccines, engineered immune cells or targeted molecular machines. Dementia remains one of medicine’s hardest problems, although its onset is usually delayed by 15–25 years. Spinal injuries, blindness, deafness and some forms of paralysis are routinely treated with regenerated tissue or neural interfaces.

Pandemic surveillance constantly samples wastewater, air, animals and hospital data. A novel pathogen is normally identified within days, and prototype vaccines are designed within hours. Manufacturing and distribution still take weeks, so dangerous outbreaks remain possible, particularly when governments conceal information. Antimicrobial resistance continues to cause problems, although programmable phages and rapidly designed drugs have replaced many conventional antibiotics.

## Computing and artificial intelligence

Artificial intelligence is no longer a distinct product category. It is part of every machine, institution and communication system.

Almost every person has several persistent AI representatives: a private tutor, medical advocate, financial manager, travel planner, legal assistant and general personal delegate. These systems remember decades of authorized context and can negotiate purchases, appointments and contracts. Their powers are legally limited, logged and revocable.

By 2122, machines exceed the best humans at nearly every well-defined intellectual task: scientific modeling, programming, diagnosis, engineering, logistics, translation and legal analysis. They can run complicated projects for months, operate laboratories and design technologies with little supervision. The 2026 starting point already included models reaching or exceeding human baselines on several difficult scientific, mathematical and coding tests, rapidly improving computer-use agents and governments beginning to standardize autonomous AI agents. ([Stanford HAI][6])

Humans nevertheless retain formal authority over decisions involving coercion, criminal punishment, war, children, irreversible medical treatment and major transfers of public resources. This is partly ethical and partly defensive: a century of failures has taught societies that optimization systems can produce catastrophic results when goals, data or institutional incentives are wrong.

Robots perform most routine manufacturing, construction, mining, agriculture, cleaning, warehousing and delivery. They are not usually humanoid. Farms use swarms of specialized machines; buildings are assembled by mobile cranes and printers; kitchens use compact manipulators; elder-care robots combine lifting equipment, monitoring and social interfaces.

Classical computing remains dominant. Quantum machines are important for molecular simulation, materials, cryptanalysis and certain optimization problems, but they function as specialized accelerators rather than universal replacements. Computation is divided between gigantic regional facilities and powerful local devices that preserve privacy and continue operating during network disruptions.

## Work and daily life

Work has not disappeared. Its social and political meaning has changed.

In wealthy societies, the normal paid schedule is approximately **25 hours a week**, often spread over four days. In middle-income regions it is closer to 30 hours. Careers are episodic: a person might study, work intensively for several years, care for relatives, retrain and return to a different occupation. A fixed retirement age makes little sense when many people remain healthy past 90.

The largest human occupations involve care, education, negotiation, management, entertainment, public legitimacy, emergency response, community leadership and the setting of goals for automated organizations. People also work in fields where customers specifically value human authorship or presence. A restaurant may advertise that its cooks are human in the same way an earlier restaurant advertised handmade food.

Routine clerical and analytical employment has largely vanished. This transformation is an extension of a process already visible in 2026, when international assessments found approximately one-quarter of global employment potentially exposed to generative AI and nearly 40 percent of jobs affected by AI more broadly. ([International Labour Organization][7])

Most states provide a package of universal basic services: health care, education, network access, minimal housing, public transport and a modest income floor. It is financed through taxes on land, resource extraction, automated production, energy and large computational systems. Private wealth and entrepreneurship remain, so societies are not economically equal. Ownership of desirable land, trusted institutions, scarce natural environments and major AI infrastructure generates substantial fortunes.

Education continues throughout life. Children learn with individual AI tutors but spend much of school working in groups, exercising, conducting physical experiments and resolving disagreements. Since information is instantly available, education emphasizes judgment, attention, verification and collaboration.

Domestic robots clean, prepare basic food, monitor homes and assist elderly residents. Buildings actively manage heat, air quality, water and power. In hot climates, public life shifts toward shaded, cooled streets and evening hours.

Much protein comes from precision fermentation, cultured tissue, insects and highly efficient aquaculture. Conventional meat still exists but is more expensive and often associated with holidays, regional traditions or luxury dining. Fresh vegetables are produced both outdoors and in automated urban or peri-urban facilities.

Material manufactured goods are inexpensive. The scarcest everyday commodities are **space, silence, trusted human attention, privacy and access to attractive natural environments**.

## Geopolitics

There is no world government and no single global hegemon.

The principal centers of power are the **United States, China, India, a more integrated European Union, and several large African powers working through a strengthened African Union**. Brazil, Indonesia, Japan, Türkiye and other middle powers frequently determine the outcome of international negotiations.

The United States remains one of the richest and most technologically capable large countries, supported by immigration, food and energy resources and favorable geography. China is smaller and older than in 2026 but remains an industrial, scientific and military superpower. India is one of the two or three largest economies. Europe is more politically integrated in defense, energy and migration because individual European states became too small to act independently at global scale.

Africa is not a unified superstate, but its population, markets and voting power make it impossible to govern global systems without African participation. Lagos, Nairobi, Addis Ababa, Kinshasa and other African centers are major financial, cultural and technological capitals.

The world remains multipolar partly because the international system was already moving in that direction by 2026, with geopolitical rivalry, trade restrictions, strategic technology policies and rising military expenditure. ([IMF][8])

Wars still occur, but combat relies heavily on drones, autonomous submarines, cyber operations, orbital surveillance, electronic warfare and attacks on energy or information infrastructure. Occupying large hostile populations remains difficult, so most conflicts are limited, indirect or fought through blockades and system disruption.

Nuclear weapons survive. I expect roughly **5,000 warheads distributed among 10–12 states**, substantially fewer than in 2026 but sufficient to preserve deterrence. Automated launch decisions are prohibited by treaty, although every major power uses AI extensively for warning and analysis. The danger of accidental escalation remains one of civilization’s central risks. In January 2026, the world still possessed more than 12,000 warheads and modernization was accelerating rather than receding. ([SIPRI][9])

International institutions are stronger in narrow areas—climate monitoring, pandemic surveillance, AI inspections, ocean management, nuclear security and space traffic—but weaker as sources of universal political authority. Countries cooperate because planetary infrastructure requires cooperation, not because national rivalry has ended.

## Climate and the natural world

Global temperature in 2122 is about **2.2°C above the 1850–1900 average**. Warming peaked near 2.3°C late in the 21st century and has begun a very slow decline as emissions become net negative.

The world therefore avoided the worst high-emission outcomes but failed to preserve the climate of the 20th century. This is consistent with a 2026 starting point in which 2025 was about 1.43°C above preindustrial conditions and full implementation of national pledges still indicated roughly 2.3–2.5°C of warming by 2100. ([World Meteorological Organization][10])

Global mean sea level is about **0.9 metres above its 1900 level** and continues rising. The delayed response of oceans and ice sheets means coastlines will keep changing for centuries even after temperature stabilizes. The IPCC projects continuing sea-level rise beyond 2100 under every emissions pathway. ([IPCC][11])

Extreme heat is the most pervasive climatic constraint. During parts of the year, outdoor labor in the Persian Gulf, South Asia, equatorial Africa and other hot regions is prohibited during daylight hours. Cities depend on shade, reflective materials, vegetation, water recycling and highly efficient district cooling.

The Arctic Ocean is almost ice-free in late summer in most years. Many mountain glaciers have disappeared, reducing dry-season water supplies. Coral reefs survive mainly in cooler refuges, assisted ecosystems and protected restoration zones. Ocean ecosystems have shifted toward the poles.

Agricultural zones have moved. Canada, northern Europe and northern Eurasia grow crops formerly associated with lower latitudes, while tropical agriculture depends on heat-tolerant genetics, controlled irrigation and indoor production. Water is recycled repeatedly; desalination is common along wealthy coasts.

Climate change has caused enormous losses of ecosystems, cultural sites and habitable land, but it has not produced a universal civilizational collapse. The defining achievement of the late 21st century was not preventing disruption; it was constructing enough clean energy, resilient infrastructure and political cooperation to keep disruption from becoming uncontrollable.

## Communication

Every inhabited part of Earth has continuous connectivity through a mesh of fibre, terrestrial radio, satellites and high-altitude platforms. Network access is considered basic infrastructure like water or roads. The path was already visible in 2025–26: three-quarters of humanity was online, 6G standards were being designed around immersive communication and ubiquitous intelligence, and satellite and terrestrial networks were converging. ([ITU][12])

Language is rarely a practical barrier. Speech is translated in real time while preserving the speaker’s voice, rhythm, humor and cultural references. Languages have not disappeared; easier communication has actually helped smaller languages survive by making publication and education inexpensive.

Lightweight glasses, contact displays and room-scale projection systems have replaced many phones and monitors. People can share three-dimensional workspaces with realistic eye contact, spatial sound and limited touch feedback. Remote interaction is convincing enough for most business, education and routine medical care, although it is still distinguishable from physical presence.

Synthetic media has made unauthenticated recordings nearly worthless as evidence. Cameras and microphones cryptographically sign genuine capture, and chains of custody are automatically recorded. People routinely ask not “Does this look real?” but “Who attests to its origin?”

Most individuals do not personally read their complete flow of messages. Their AI systems summarize, rank, translate and negotiate it. Reaching another person’s unfiltered attention is a privilege that must be granted.

Brain-computer interfaces are widely used for paralysis, sensory loss, specialist industrial control and a few demanding professions. They are not the normal means of communication. Speech, gesture, gaze and typing remain easier, safer and less intrusive than surgery. There is no literal telepathy and no transfer of a human mind into a computer.

## What an ordinary day feels like

A typical middle-class resident of 2122 might be a healthy 78-year-old living in a twelve-storey district near Nairobi. Her apartment produces part of its electricity and stores water for interruptions. In the morning, her medical system reports a minor inflammatory change and schedules a painless diagnostic scan.

She works four hours helping a regional planning council choose among infrastructure proposals generated and tested by AI. The machines perform the engineering; her group decides which neighborhoods should bear the disruption and whether the project serves legitimate public goals.

An autonomous tram takes her across the city. She speaks Swahili during a meeting with colleagues speaking Hindi, French and Portuguese, each hearing the others in their preferred language. Lunch contains vegetables grown outside the city and fermented protein made nearby.

That evening she attends a physically local concert because live, unmediated performance has become more—not less—valuable. Her grandchildren join briefly through spatial telepresence from another continent. Outside, the city is greener, quieter and more efficient than a 2026 metropolis, but its cooled arcades and enormous storm-water channels are constant reminders that it was built for a warmer and less forgiving planet.

**The world of 2122 is neither a utopia nor a ruin.** It is an old, urban, machine-assisted civilization that has acquired extraordinary power over energy, matter and biology while remaining recognizably human: divided into nations, concerned with status and fairness, vulnerable to war and error, and still dependent on a living Earth it cannot fully control.

[1]: https://www.un.org/sustainabledevelopment/blog/2024/07/press-release-wpp2024/?utm_source=chatgpt.com "Press Release | UN projects world population to peak within this century - United Nations Sustainable Development"
[2]: https://www.un.org/en/global-issues/population?utm_source=chatgpt.com "Population | United Nations"
[3]: https://www.icao.int/SAF?utm_source=chatgpt.com "Sustainable Aviation Fuels (SAF)"
[4]: https://www.iea.org/reports/world-energy-outlook-2025/executive-summary "Executive summary – World Energy Outlook 2025 – Analysis - IEA"
[5]: https://www.fda.gov/news-events/press-announcements/fda-approves-first-gene-therapies-treat-patients-sickle-cell-disease?utm_source=chatgpt.com "FDA Approves First Gene Therapies to Treat Patients with ..."
[6]: https://hai.stanford.edu/ai-index/2026-ai-index-report "hai.stanford.edu"
[7]: https://www.ilo.org/resource/news/one-four-jobs-risk-being-transformed-genai-new-ilo%E2%80%93nask-global-index-shows?utm_source=chatgpt.com "One in four jobs at risk of being transformed by GenAI, new ..."
[8]: https://www.imf.org/en/news/articles/2026/04/14/tr-04142026-press-briefing-transcript-world-economic-outlook-spring-meetings-2026?utm_source=chatgpt.com "Press Briefing Transcript: World Economic Outlook, Spring Meetings 2026"
[9]: https://www.sipri.org/media/press-release/2026/increasing-focus-nuclear-weapons-amid-heightened-escalation-risks-new-sipri-yearbook-out-now?utm_source=chatgpt.com "Increasing focus on nuclear weapons amid heightened ..."
[10]: https://wmo.int/publication-series/state-of-global-climate/state-of-global-climate-2025 "State of the Global Climate 2025"
[11]: https://www.ipcc.ch/report/ar6/wg1/chapter/summary-for-policymakers/?utm_source=chatgpt.com "IPCC AR6 Working Group 1: Summary for Policymakers"
[12]: https://www.itu.int/itu-d/reports/statistics/2025/10/15/ff25-internet-use/?utm_source=chatgpt.com "Internet use - Statistics"