Most of the World's Languages May Have Died Without Leaving a Word

Two thousand years ago, people on Earth may have spoken anywhere from 20,000 to 75,000 languages. About 7,000 are still spoken, and most of the missing ones left no record at all.

The estimate comes from a study in Science led by Damián Blasi, a Harvard University researcher who studies how languages evolve. With nothing written to consult, the team worked from population. They began 12,000 years ago, when the world held an estimated 4 million to 7 million people. If ancient hunter-gatherer bands matched modern ones in size, and each had its own tongue, the world likely held 5,000 to 6,000 languages.

Next the team ran thousands of simulated histories, and the results broadly agreed. As farming fed more people, languages multiplied, peaking during what the authors call a golden age from 1000 B.C. to A.D. 1000. Then came a steep decline, possibly sped along as sprawling multinational states like the Roman Empire rose. It continues. A language still disappears every few weeks.

Linguists tend to treat living languages as a map of what human brains and bodies can manage. If those are only remnants, Blasi suggests, speech may once have been far richer and stranger.

Not everyone is convinced. Lyle Campbell of the University of Hawaii calls the work highly speculative, though possibly headed in the right direction, since no one can pin down how big ancient groups were. Johanna Nichols, a Berkeley linguist who had no part in the study, argues that many neighboring tongues may have blurred into one long continuum of dialects.

Whatever sounds and grammar those lost thousands used, almost none of them left a forwarding address.

Read the full story at Scientific American, July 23, 2026

Hot Take: The rules of human language were written from the survivors. Records have a habit of describing what lasted and calling it what was possible.