Population Growth vs Ageing: The Global Demographic Divide
Young populations are expanding in parts of Africa and Asia, while ageing societies face shrinking workforces. Explore how demographics could reshape jobs, migration, and the global economy.
By Jay Jarwar
8/15/20267 min read
The Demographic Divide: How Population Growth and Ageing Are Reshaping the World
Introduction
Population has always influenced economic power, labour markets, political influence and the ability of societies to support future generations. But the demographic story of the twenty-first century is becoming increasingly divided.
Some countries—particularly across parts of Africa, South Asia and other developing regions—continue to experience rapid population growth and expanding numbers of young people. At the same time, many economies in Europe and East Asia are confronting falling fertility rates, ageing populations and shrinking workforces.
According to the United Nations World Population Prospects 2024, the global population stood at around 8.2 billion in 2024 and is projected to peak at approximately 10.3 billion in the mid-2080s. Yet this global figure hides enormous regional differences. Some countries are still growing rapidly while others have already reached, or are approaching, population decline.
The challenge is therefore not simply whether a country has more people or fewer people. What matters is the relationship between population, age structure, employment, productivity, education and economic opportunity.
A youthful population can become an enormous economic asset—but only if people are healthy, educated and productively employed. An ageing society can remain prosperous—but only if it adapts its labour markets, pension systems, healthcare and technology.
The emerging demographic divide could therefore become one of the most important forces shaping the global economy in the decades ahead.
The Youthful Population Boom: Opportunity or Pressure?
Rapid population growth is not automatically an economic burden.
When a country's working-age population expands relative to the number of dependants, it can create what economists call a demographic dividend. More workers can potentially mean higher production, greater consumption, increased savings, entrepreneurship and a larger domestic market.
But the dividend is not automatic.
The World Bank estimates that around 1.2 billion young people in developing countries will reach working age over the coming decade. Creating enough productive employment for this generation will be one of the defining development challenges of the period ahead.
Without sufficient economic opportunity, rapidly growing countries can face increasing pressure from:
Unemployment and underemployment
Urban overcrowding
Housing shortages
Pressure on schools and healthcare
Water and food insecurity
Congested transportation
Environmental degradation
Inadequate infrastructure
Rising demand for public services
The crucial question is therefore not simply how many young people a country has, but whether its economy can equip them with education, skills and opportunities.
A young population without opportunity can create economic pressure. A young population with education, employment and productive investment can become one of a country's greatest long-term advantages.
Pakistan: A Demographic Test Case
Pakistan demonstrates both sides of this demographic equation.
The country's 2023 census recorded a population of roughly 242 million and an intercensal annual population growth rate of 2.55%. A major UNFPA study on Pakistan's demographic future warns that the country's fertility transition has slowed and that rapid population growth continues to place pressure on economic development.
At the same time, Pakistan possesses a large and expanding working-age population. This creates a potential demographic opportunity—but capturing it requires much greater investment in education, skills, healthcare, women's participation in the economy, job creation and productive industries.
Pakistan's demographic future therefore illustrates a broader global lesson:
Population size alone does not create economic power. Human capital does.
A country can possess millions of young workers, but unless those workers are educated, skilled and connected to productive economic activity, the potential demographic dividend may remain unrealised.
The Ageing Challenge
Many advanced economies face a very different demographic reality.
Fertility rates have fallen below replacement levels across much of Europe and East Asia, while people are also living longer. The combination is changing the age structure of entire societies.
Japan, South Korea, Italy and several other European and East Asian economies are already experiencing strong ageing pressures. China is also moving rapidly into an older demographic structure.
The OECD Employment Outlook 2025 projects that the working-age population across OECD countries could decline by around 8% between 2023 and 2060. In more than a quarter of OECD countries, the decline could exceed 30%.
The same report projects the OECD old-age dependency ratio—the number of people aged 65 or above relative to the working-age population—to rise from 31% in 2023 to around 52% by 2060.
This creates several challenges:
Labour shortages
Higher pension expenditure
Rising healthcare and long-term care costs
A smaller tax base
Pressure on economic growth
Greater demand for older workers to remain economically active
Increased interest in immigration
Greater investment in automation and artificial intelligence
Instead of primarily planning for more schools and first-time job seekers, ageing societies increasingly need to think about elderly care, healthcare capacity, retirement systems, and how to maintain productivity with fewer workers.
Two Different Demographic Problems, One Economic Question
Rapid population growth and population ageing may appear to be opposite problems.
Economically, however, they lead to a similar question:
How can a country maintain prosperity when the structure of its population changes faster than its economy can adapt?
Young societies need to create employment, infrastructure, and human capital quickly enough to absorb expanding populations.
Older societies need to maintain productivity and living standards despite slower workforce growth and increasing numbers of retirees.
The International Monetary Fund notes that population growth, age structure, and migration influence labour supply, savings, investment, and demand throughout an economy. Its research also highlights how ageing and shrinking workforces can become a drag on growth, while migration, longer working lives, productivity improvements, and technology can help offset some of these pressures.
Demographic policy cannot, therefore, be separated from economic policy.
Can AI and Automation Offset an Ageing Workforce?
Technology will almost certainly become part of the demographic response.
Artificial intelligence, robotics, and automation may allow companies to produce more with fewer workers. This could be particularly valuable in countries where labour forces are shrinking.
Automated manufacturing, AI-supported healthcare, robotics, digital services and productivity-enhancing technologies could help ageing societies compensate for worker shortages.
But technology is not a complete substitute for people.
Healthcare workers, teachers, engineers, entrepreneurs, caregivers and many skilled professionals perform tasks that involve judgement, responsibility, human interaction and creativity.
Even the OECD cautions that productivity gains from AI and automation may not, on their own, be sufficient to fully offset the economic effects of declining labour supply.
Related Reading: The Future of Work: Will Humans and AI Become Partners or Competitors?
For younger countries, the challenge is different. Automation may increase productivity, but it also raises the skills required for many jobs. Countries with rapidly expanding labour forces, therefore, need education and technical training that prepare young people to work with technology rather than compete against it.
Migration Could Become More Strategically Important
One consequence of the demographic divide may be increasing competition for skilled workers.
Ageing economies already rely to varying degrees on migration to supplement domestic labour supply. As workforce shortages intensify, engineers, doctors, nurses, technology specialists, construction workers and other skilled professionals could become increasingly valuable internationally.
The IMF finds that migration has already helped offset demographic pressures in advanced economies by supporting labour supply.
This could create a significant opportunity for younger countries that invest effectively in education and skills.
Instead of viewing their large populations only as domestic labour forces, countries may increasingly view skilled human capital as an exportable economic asset—through international migration, remote work, digital services and global professional networks.
Migration, however, cannot solve ageing by itself. It requires social integration, housing, infrastructure, and sustainable immigration policies in destination countries, while countries losing skilled workers must also manage the risk of brain drain.
Climate Change Makes the Demographic Challenge Harder
Population and climate pressures are also becoming increasingly interconnected.
Growing populations require additional:
Food
Housing
Electricity
Transportation
Water
Schools
Hospitals
Infrastructure
Climate change can make providing those resources more difficult.
The Intergovernmental Panel on Climate Change has documented growing climate-related risks to food production, water availability, livelihoods and human settlements, particularly in regions already vulnerable to heat, drought, flooding and other extreme events.
This does not mean population growth alone causes environmental stress. Consumption patterns, technology, energy systems and economic structures also matter enormously.
But where very rapid population growth coincides with water scarcity, weak infrastructure and climate vulnerability, governments may face several pressures simultaneously.
For countries such as Pakistan, demographic planning and climate resilience therefore increasingly need to be considered together.
Related Reading: Pakistan's Rising Heat: Are We Prepared for a Hotter Future?
The Global Economy Could Gradually Shift Toward Younger Regions
Demographic change may eventually reshape where economic activity takes place.
Countries with large, productive and increasingly prosperous working-age populations could become important future centres of:
Manufacturing
Consumer demand
Digital services
Entrepreneurship
Infrastructure investment
International labour supply
Meanwhile, ageing economies may invest more aggressively in automation, seek skilled migrants, and move some labour-intensive production toward younger regions.
This does not mean demographic growth automatically shifts economic power. Institutions, education, infrastructure, political stability, productivity and access to capital remain critical.
But demographics influence the foundation on which these other factors operate.
In the coming decades, labour and human capital may become strategic assets in much the same way that energy, technology, and natural resources already shape international competition.
Related Reading: The Digital Economy: AI, Payments & E-Commerce in the Next Decade
There Is No Perfect Population Number
Debates about population often fall into two extremes.
One side fears overpopulation. Another fears population collapse.
Neither captures the full picture.
A rapidly growing population can be economically successful when accompanied by strong institutions, education, healthcare, infrastructure and employment.
A stable or slowly declining population can also remain prosperous when productivity is high and societies adapt successfully to ageing.
The real objective should therefore not be an arbitrary population target.
It should be demographic resilience—the ability of a society to adapt to changes in fertility, longevity, migration and age structure while protecting economic opportunity and quality of life.
For younger societies, that means investing in people.
For ageing societies, it means improving productivity, extending healthy working lives, adapting pension and healthcare systems, supporting families, and managing migration effectively.
Final Perspective: Demography Is Not Destiny
The demographic divide is likely to become one of the defining global stories of the twenty-first century.
Some countries will struggle to create opportunities for rapidly expanding young populations. Others will attempt to sustain growth with fewer workers and larger retired populations.
Neither population growth nor population ageing automatically determines whether a country succeeds.
Policy matters.
Education matters.
Productivity matters.
Institutions matter.
Technology matters.
And above all, the ability to transform people into skilled, healthy and economically productive citizens matters.
The countries best positioned for the decades ahead may therefore not be those with the largest populations—or even those with the most favourable demographic structures today.
They may be the countries that understand their demographic reality early enough to prepare for it.
About the Author
Jay Jarwar is the founder and editor of JayJarwar Insights. He writes about artificial intelligence, technology, geopolitics, economics, public policy, and emerging global trends, with a focus on explaining complex issues in clear and accessible language.
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