The world’s population is currently at a record high of 8.3 billion and is expected to continue growing throughout the 21st century, significantly impacting planetary sustainability. Credit: Shutterstock By Joseph Chamie
PORTLAND, USA, Mar 23 2026 (IPS) On planet Earth, world population in 2026 is 8.3 billion people , which is four times larger than it was a hundred years ago.
Despite this record number of humans living on the planet, world population is expected to continue increasing throughout the 21st century, significantly impacting planetary sustainability. Over the past two hundred years, the human population on the planet has experienced unprecedented growth rates. For example, it took thousands of years for world population to reach the one billion mark at the beginning of the 19th century, in 1804 .
In the subsequent centuries, the growth of world population accelerated with record high rates of demographic growth. It took approximately 123 years for the world’s population to increase from one billion to two billion and 47 years for the world population to double again, reaching four billion in 1974.
The time required for the subsequent billion additions to the world population was relatively short, approximately twelve years. In summary, the human population on planet Earth has increased five-fold since the beginning of the 20th century (Figure 1). Source: United Nations.
United Nations population projections anticipate that world population will continue to grow throughout the 21st century. By around 2060, world population is expected to reach 10 billion, which is ten times the size it was in 1804. Furthermore, world population is projected to peak at 10.3 billion in 2084 and then slightly decrease to 10.2 billion by the end of the century.
As the world population has grown rapidly, the geographic distribution of billions of people across the planet has also significantly changed since the beginning of the 20th century.
Particularly notable are the changing proportions of the world’s population living in Africa and Europe. At the start of the 20th century, the proportions of the world’s population living in Africa and Europe were 8% and 25%, respectively. By the end of the 21st century, those proportions are projected to be 37% for Africa and 6% for Europe (Table 1). Source: United Nations.
Another significant change involves the proportion of the world’s population living in Asia. At the beginning of the 20th century, around 60% of the world’s population lived in Asia. However, by the close of the 21st century, that proportion is expected to decrease significantly to 45%.
The proportions of the world’s population living in the other three major regions have been relatively stable, remaining in single digits. The proportions for Latin America and the Caribbean, Northern America and Oceania are approximately 8%, 5% and 1%, respectively.
The shifts in the global distribution of world population have led to significant economic, political, social, and environmental implications. Despite these important consequences, much attention in the media, business boardrooms, and government offices is focused on low fertility rates and the resulting population decline in many countries.
It is the case that more than half of the countries worldwide have fertility rates below replacement levels , leading to population decline and demographic ageing. However, the media often portrays a stable or smaller population in a negative light.
The consequences of the ongoing population growth, projected to reach 10.3 billion people by 2084, will lead to a complex mixture of global problems that many governments, unfortunately, typically ignore, dismiss, or minimize In such reporting, terms like “weak” or “anemic” are used to describe moderate population growth, while “flat” or “stalled” are used for stable population. Additionally, those who warn of depopulation often predict a future crisis instead of discussing any positive relief from current environmental and climate concerns or the benefits for women and working families.
Many people, especially traditional economists and right-wing politicians, assume that population growth is essential for a flourishing economy. These individuals advocate for population growth because they believe it drives economic growth, increases the labor supply, and stimulates consumption.
The concern about the birthrate crisis is often fueled by those who benefit from a growing population. These individuals often provide information or central messages, such as population collapse , failing economies , demographic crisis , and human e xtinction , which are then picked up by the media and lead to misleading headlines.
Moreover, many government officials are calling for increased population growth through higher fertility rates and implementing policies and actions to support such outcomes. These calls, policies, and actions are primarily driven by concerns over demographic ageing, declining workforces, and economic sustainability.
In essence, their message is that a growing population leads to a larger economy, more entrepreneurs, market expansion, and innovation. Additionally, some government officials choose to focus on women and blame them for their country’s low birth rates.
In contrast, a stable population is often viewed as stagnant. The demographic ageing of populations and increased human longevity are seen as problematic, leading to a “demographic winter” with significant financial stresses on government budgets for pensions and health care for older individuals.
While the world’s population of 8.3 billion is projected to continue growing throughout most of the 21st century, low fertility rates and demographic ageing are seen as challenges rather than accomplishments.
Additionally, as the planet’s environmental and climate crises accelerate, large portions of society continue to ignore the fact that a world with more than 8 billion people is a critical factor driving them. These groups typically dismiss research findings indicating that a world population of 8 billion, which is continuing to increase, drives climate change, ecological disruption, rising sea levels, biodiversity loss, habitat destruction, resource scarcity, and food insecurity.
For example, global wildlife is currently facing a worsening crisis. The most recent United Nations assessmen t warns that nearly half of the world’s migratory animal species are declining due to human activity, habitat destruction, and climate change.
Moreover, melting glaciers in Antarctica are hastening sea-level rise in coastal cities. The Thwaites Glacier , in particular, is melting at an alarming pace. If it were to break apart completely and collapse today, it could raise global sea levels by 2 feet in the next few decades, affecting tens of millions of people worldwide.
In summary, the world’s population is currently at a record high of 8.3 billion and is expected to continue growing throughout the 21st century, significantly impacting planetary sustainability.
The consequences of the ongoing population growth, projected to reach 10.3 billion people by 2084, will lead to a complex mixture of global problems that many governments, unfortunately, typically ignore, dismiss, or minimize. These problems include resource strains, increased conflict, environmental damage, climate change, sea level rise, habitat destruction, biodiversity loss, food insecurity, increased unauthorized migration, and greater societal vulnerabilities. Joseph Chamie is a consulting demographer, a former director of the United Nations Population Division, and author of many publications on population issues.