Today, there are about 7,500 languages spoken on our planet, but research shows that in the past, this number was significantly higher. An international team of linguists has reconstructed the dynamics of linguistic diversity over the last 12,000 years and concluded that the peak number of languages has already passed, after which their number began to decline rapidly.

The Role of Language in Culture

Language is not only a means of communication but also a repository of knowledge about the past, worldviews, traditions, and ways people interact with their environment. For this reason, linguistic diversity is considered an important indicator of humanity’s cultural wealth. Currently, nearly 40% of languages are at risk of extinction, and several languages disappear every year.

Historical Dynamics of Languages

Although the problem of language extinction is well known, until recently there was little data on how linguistic diversity has changed throughout human history. Archaeological discoveries and genetic studies provide insights into the settlement and migrations of ancient peoples, but most ancient languages had no written form, making them difficult to study.

For a long time, it was believed that the main reduction in the number of languages occurred relatively recently—during the era of European colonization, starting from the 15th–16th centuries. The spread of major languages and globalization led to the gradual disappearance of small language communities.

There are also other hypotheses. Some experts suggest that the maximum number of languages was reached soon after the end of the last Ice Age, when people lived in small, isolated groups, each of which could have spoken its own language.

Mathematical Reconstruction

A group of researchers from the USA mathematically modeled the change in the number of languages worldwide over the past 12,000 years. For this, they used modern data on languages, ethnographic information about the sizes of traditional hunter-gatherer societies, estimates of the Earth's population at different historical periods, and Bayesian statistical methods.

Assuming that small ethnolinguistic communities typically speak a single language, the researchers calculated the possible number of languages at different population densities and group sizes.

Main Findings

According to their calculations, at the beginning of the Holocene, before the widespread adoption of agriculture, there were approximately 4,500 to 6,000 languages on Earth—fewer than today. As the population grew and people spread out, the number of languages increased rapidly. The greatest linguistic diversity was reached roughly between 3,000 and 1,000 years ago, when there may have been tens of thousands of languages worldwide.

Later, a rapid decline in the number of languages began, associated with the emergence of the first large states and multinational empires, which introduced administrative languages, new forms of political organization, trade connections, and cultural assimilation. As a result, small language communities gradually disappeared or switched to the languages of larger societies.