Today, anthropologists have also determined that a simultaneous agricultural revolution was happening throughout Asia and South America. The first recorded agricultural revolution took place in the Fertile Crescent located in the Middle East. This corresponds to a warming period that occurred right after having experienced an ice age. They gradually left behind the nomadic, hunter-gatherer lifestyle and began to settle in villages and other permanent settlements. This is the era in which humans learned to control crops and animals. It is after all of this change, that humans discovered agriculture.īy the year 6,500 BCE, the population reached 10 million and this was largely the cause of the first Agricultural Revolution. The great migration continued until humans also found their way to Europe and then the Americas. It is believed that they first reached the Asian continent and 30,000 years later, Australia. As population size began to grow and the winter seemed like it would never end, humans spread out once again across the globe. ![]() These extinctions left Homo sapiens, modern day humans, as the only human species on earth. First, the Neanderthals died out and this event was followed by the Homo floresiensis. This climate change was prompted by a super-volcanic eruption that led to a years-long winter. Over the span of 100,000 years, 2 human species became extinct largely due to an extreme change in climate. During these years, the earth housed around 3 million people. Fast-forward to the year 10,000 BCE, the world population was significantly higher than its beginning numbers. In the beginning, there were 3 human species. The lack of rain sent early humans in search of water and thereby spreading the population. This is also when humans began migrating to other areas of Africa from the eastern side due a changing climate that brought on droughts. ![]() In fact, around 130,000 years Before the Common Era (BCE), the number of humans on earth was only around 200,000 and largely concentrated on what is now the African continent. Researchers believe that the human population began around 3 million years ago, but as hunter-gatherers, the population size remained small. Historical Growth of Human Population Ancient Humans Once growing slowly and sustainably, over the last century population growth has been exponential and giving rise to ever greater levels of concern. Specifically, how many people have ever lived and when? Scientific evidence suggests that the world population has changed drastically throughout history and at different periods of the development of earth. A common question that people have asked throughout all ages ask is about the history of the world population.
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