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Evolutionary linguistics

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Evolutionary linguistics, also known as Darwinian linguistics, is a sociobiological approach to studying language. This field views language as a product of nature. It treats linguistics as a subfield of sociobiology and evolutionary psychology. Researchers investigate the biological origins and the development of language. This study is closely linked to evolutionary anthropology, cognitive linguistics, and biolinguistics.

Unlike humanistic approaches, such as structural linguistics, this field focuses on how biology shapes the brain. This brain then processes language. However, a major challenge exists in this research. There are no archaeological traces of early human language. Scientists cannot find fossils of spoken words. To fill these gaps, they use computational biological modelling. They also use clinical research involving artificial languages.

Researchers debate what kind of natural phenomenon language actually is. Some scientists focus on innate aspects of language. They suggest that grammar emerged adaptationally from the human genome. This would create a specific language instinct. Another hypothesis suggests a single mutation caused a language organ to appear in the brain. This might result in a crystalline grammatical structure. This structure would be the same underlying all human languages.

Other researchers believe language is not crystallized. They argue it is fluid and ever-changing. Some even liken languages to living organisms. These views compare languages to parasites or populations of mind-viruses. There is currently little scientific evidence for these specific claims. Some of these ideas have even been called pseudoscience.

The history of these ideas began in the 19th century. In 1863, August Schleicher took the metaphor of living languages literally. He was inspired by Charles Darwin's work on species. Schleicher proposed that linguistics could test the evolution of species. In 1871, Darwin wrote about this in "The Descent of Man." He claimed languages are comparable to species. He believed language change occurs through natural selection. He thought words "struggle for life" just like animals. Darwin even suggested languages evolved from animal mating calls.

During this era, the concept of social Darwinism emerged. Some thinkers, like Ernst Haeckel, viewed culture through the lens of botany. They saw different cultures competing for living space. These ideas were later used by politicians, including the national socialists. This led to a strict separation between natural and sociocultural studies. By 1916, Ferdinand de Saussure proposed structuralism. This replaced evolutionary linguistics in many academic circles. Structuralism became dominant in Europe for many decades. It remained influential until the student revolts of 1968.

In the United States, the field shifted again. Noam Chomsky became a highly influential figure. He argued that syntactic structures are innate to the human mind. Chomsky suggested these structures might come from a random mutation in the genome. This idea is part of biological determinism. In 1990, Steven Pinker offered a different view. He argued language is the outcome of evolutionary adaptations. Since 1976, a new approach called memetics has also emerged. This comes from Richard Dawkins's book, "The Selfish Gene." It views linguistic units as replicators.

Today, evolutionary linguistics is divided into two main views. The first is functionalism, or the adaptational view. Functionalists believe language is an adaptation to the human mind. They see language as part of general cognitive capacities. This includes perception, attention, and motor skills. They study how the brain links actions to meaning through "constructions." The second view is formalism. Formalists argue that linguistic structures are crystallized. They compare these patterns to snowflakes or botanical forms. They believe these patterns are caused by mutations.

There are many ongoing debates regarding the evidence for these theories. Scientists once hoped the FOXP2 gene would provide a breakthrough. Some thought it might be "the grammar gene." However, there is little support for this idea. It is unclear if FOXP2 caused the emergence of complex speech. Critics like Esa Itkonen argue that natural selection does not apply to language. They say language changes because of the speech community. In biology, mutation and selection come from different sources. In language, innovation and acceptance come from the same source.

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