World population

Many people live on Earth today.

There are over 8 billion people.

Long ago, people lived in small groups. They hunted animals to stay alive. They also gathered seeds and nuts.

Then, people learned to farm. They grew plants like wheat and corn. This gave them more food to eat.

More food helped the group grow. New people could help work the fields. This meant more food for everyone.

Today, many people live in big cities.

The world is a very busy place.

The world population is the total number of people alive. On November 15, 2022, it passed 8 billion people. By 2026, it was about 8.3 billion.

Long ago, humans lived in small groups. They hunted animals and gathered nuts. Around 9000 BC, people began to farm. They grew crops like wheat and rice. Farming provided a steady food supply. This helped the number of people grow.

In the past, the population changed a lot. Some events caused many people to die. The Black Death was a very sad time. It caused the world population to fall. Later, new crops from the Americas helped. These crops grew in Europe and Asia. This helped more people survive.

In the 1900s, the population grew very fast. This was due to better medicine and sanitation. Many people moved to big cities.

Today, the growth rate is slowing down. Experts think the population will reach 9 or 10 billion by 2050. Some think it may even drop later this century.

The world population is the total number of humans alive on Earth. It is a huge number that changes every single day. On November 15, 2022, the United Nations said we passed 8 billion people. By the year 2026, the number was about 8.3 billion. It took a very long time for humans to reach one billion. It took 300,000 years of history to reach that first billion mark. However, it only took 218 more years to reach 8 billion.

Long ago, humans lived very differently than they do today. Before 9000 BC, most people were hunter-gatherers. They lived in small groups and moved to find food. They hunted animals and gathered wild seeds or nuts. If animals were hard to find, people might starve. Around 9000 BC, people began to farm in the Middle East. This was a big change called an agricultural revolution. Farming allowed people to grow and store food for a long time.

Farming changed how many people could live on the land. In the Middle East and Europe, people grew wheat. In Southeast Asia, they grew rice. In Central America and Peru, they grew corn. These crops provided a steady supply of food for many workers. Because more food was available, the human population began to grow. People also built irrigation canals to bring water to their crops. This helped large groups of people live together in places like Egypt and China.

History has also seen many times when the population went down. In the 14th century, a sickness called the Black Death spread. The world population fell from 443 million to about 350 million. In China, the population dropped from 123 million to 65 million between 1200 and 1393. This happened because of famine, plague, and wars. Later, new crops from the Americas helped people in Africa and Europe. Maize and cassava became very important foods in Africa.

Today, the way our population grows is changing again. Between 1955 and 1975, the growth rate was very high. It reached a peak of 2.1% between 1965 and 1970. Now, the growth rate is actually slowing down. Experts at the UN think we will reach 9 or 10 billion people by 2050. Some scientists think the number might even fall later this century. This depends on how many babies are born and how long people live.

The world population is the total number of humans living on Earth at any given time. This number is a key part of demography, which is the study of how populations change. On November 15, 2022, the United Nations estimated that the human population exceeded 8 billion people. By 2026, that number had risen to approximately 8.3 billion.

Understanding these numbers helps us see how human history has changed. It took roughly 300,000 years of human existence to reach the first one billion people. However, it took only 218 more years to go from one billion to 8 billion.

For much of prehistory, human population patterns were very different. Before 9000 BC, most humans were hunter-gatherers. They lived in small bands and relied on hunting animals or gathering wild seeds and nuts. This way of life was often unstable. If animal supplies dwindled, humans faced starvation. Because they had not yet domesticated animals, they could not easily control their food supply.

One very rough estimate suggests that about 8 million hunters lived around 9000 BC.

A massive change occurred during the agricultural revolutions in the eastern hemisphere. Around 9000 BC, some groups in the Middle East began to domesticate and graze sheep. Cultivating plants also began independently in different parts of the world. In the Middle East and Europe, people grew wheat between 6500 and 3500 BC. In Southeast Asia, rice cultivation began around 6800 BC. In Central America and Peru, corn was grown starting about 2500 BC.

This new technology allowed for a steady food supply that could be stored for a year or more. This minimized the risk of famine and allowed the population to grow.

Agriculture changed the structure of human society. Farming required systematic human exertion and more workers. Because every new person could help plant and harvest, children became very valuable in these societies. People also built irrigation systems to provide stable water for crops. These systems were used in places like Egypt, Mesopotamia, India, China, Peru, and Mexico. These agricultural practices allowed people to live in permanent villages and eventually form large states.

However, growth was often slowed by high death rates, especially among infants and children.

History shows that the population has not always grown steadily. Large-scale events have caused significant declines. For example, the Plague of Justinian caused Europe's population to drop by about 50% between the 6th and 8th centuries AD. Later, the Black Death pandemic hit in the 14th century. Between 1340 and 1400, the global population fell from about 443 million to between 350 and 375 million. In China, the population dropped from 123 million in 1200 to 65 million in 1393 due to Mongol invasions, famine, and plague.

These events show how vulnerable large groups of people can be to disease and conflict.

Modern history has seen much faster growth due to changes in medicine and food. During the Industrial Revolution, life expectancy for children increased. In London, the percentage of children dying before age five dropped from 74.5% in the mid-1700s to 31.8% by the early 1800s. The introduction of new crops also helped. In the 16th century, Portuguese and Spanish colonists brought new crops from the Americas to Asia and Europe. Maize and cassava became staple foods in Africa after being introduced by Portuguese traders.

These improvements helped the population grow much more quickly than in previous centuries.

Today, the way the population grows is shifting again. The highest growth rates occurred between 1955 and 1975, peaking at 2.1% per year between 1965 and 1970. Now, the growth rate is declining. The UN Department of Economics and Social Affairs projects the population will reach 9 to 10 billion by 2050. They also suggest the population could reach between 10 and 12 billion by the end of the 21st century.

However, some demographers believe the population may actually begin to decline in the second half of the century if fertility rates continue to fall. The global median age as of 2026 was 31.1 years.