If all people on Earth stopped having children at the same time, it might be thought that humanity would immediately disappear. However, from a scientific point of view, this process would occur in a long-term and gradual manner.
AzEdu.az has conducted research on the topic based on foreign sources.
Although no significant change in population would be felt in the first years, over time, the absence of a new generation would affect all areas of society, and as a result, human civilization would enter an irreversible stage of decline.
In a future where no new generation is born, there will be no need for schools, universities, and the education system. Since there will be no students, the teaching profession will eventually become history, and the education system will completely cease its activities. In this regard, the absence of a new generation means not only a decrease in population but also the end of the continuity of humanity's scientific, educational, and cultural heritage.
Demographically, a complete halt in births would rapidly change the age structure of the population. Within a few decades, there would be almost no children and young people, and society would consist mainly of elderly people. The absence of new people entering the labor market would lead to a weakening of production, the service sector, and economic activity. Areas such as pension systems, social security, and healthcare would face serious financial and personnel shortages.
According to experts, population decline does not only mean a decrease in the number of people. A more serious problem is the number of people of working age falling below a critical threshold. A shortage of labor in vital areas such as agriculture, energy production, transport, communications, healthcare, and security could paralyze food production and the provision of essential services. As a result, even if the population decreased, scarcity and social crisis would arise because existing resources could not be produced and distributed.
Scientists believe that in such a scenario, the collapse of civilization could occur long before the death of the last representative of humanity. The cessation of clean drinking water systems, electricity, drug production, and logistics networks would sharply worsen living conditions. According to some anthropologists, although the complete disappearance of humans could theoretically take about 100 years, the basic structures of modern civilization could already seriously collapse within 70-80 years.
Of course, a sudden drop in births to zero worldwide is an extremely low-probability scenario in real life. This can only be associated with global-scale emergencies. This topic is often explored in science fiction works. For example, in Kurt Vonnegut's novel "Galapagos," the cause that leads humanity to infertility is an infectious disease that causes people to lose their reproductive capacity. Other possible scenarios include global nuclear war, planet-wide biological disasters, or unknown factors affecting reproductive health.
In recent decades, views on world population growth have also changed. In the 1960s and 70s, some scientists believed that excessive population growth would be the main threat to the planet. However, currently, the decline in birth rates in many countries has created new demographic problems. According to United Nations projections, although the world population continues to grow, the growth rate has significantly weakened and is expected to stabilize towards the end of the century.
Especially in developed countries, the birth rate has fallen below the level required for the population to renew itself. For example, in the US, 4.1 million births recorded in 2004 decreased to approximately 3.6 million in 2024. During the same period, deaths increased from 2.4 million to 3.3 million. Similar trends are observed in Japan, South Korea, Italy, Germany, and other countries. Demographers state that the decrease in the young population weakens economic growth, slows down innovation, and increases the social burden in aging societies.
Among the main reasons for the decline in birth rates are economic uncertainty, rising living costs, career priorities, late marriages, urbanization, increased participation of women in education and the labor market, as well as expanded family planning opportunities. Although governments in some countries have tried to increase birth rates with financial support, tax incentives, and social programs, these measures have not yet yielded long-term and sustainable results.
Modern humans - Homo sapiens - formed in Africa approximately 200-300 thousand years ago and are the only human species living on Earth today. Nevertheless, history shows that the extinction of human species is possible. Neanderthals, who lived approximately 40 thousand years ago, became extinct. Scientists explain their disappearance with factors such as climate change, competition for resources, and interaction with modern humans. This fact shows that no species can be considered completely safe.
However, experts believe that the probability of humanity completely disappearing in the near future is quite low. Humans have the ability to overcome many global problems thanks to the development of science, technology, and medicine. For this, consistent steps are important in reducing the effects of climate change, preventing nuclear conflicts, protecting biodiversity, strengthening global health systems, and protecting reproductive health.
If one day humanity completely disappears from the Earth, new ecological opportunities may arise for other living species on the planet. However, along with this, all the heritage of science, culture, art, languages, and civilization that has formed over millennia will also be lost forever.
That is why scientists believe that the future of humanity depends not only on the size of the population but also on the preservation of a healthy, sustainable, and balanced development model.
