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arwinian adaptation there are many competing theories of how language might have evolved if indeed it is an evolutionary adaptation they stem from the belief that language development could result from an adaptation an exaptation or a by product genetics also influence the study of the evolution of language it has been speculated that the foxp2 gene may be what gives humans the ability to develop grammar and syntax language evolution theories edit in the debate surrounding the evolutionary psychology of language three sides emerge those who believe in language as an adaptation those who believe it is a by product of another adaptation and those who believe it is an exaptation adaptation edit the scientist and psychologists steven pinker and paul bloom argue that language as a mental faculty shares many likenesses with the complex organs of the body which suggests that like these organs language has evolved as an adaptation since this is the only known mechanism by which such complex organs can develop the complexity of the mechanisms the faculty of language and the ability to learn language provides a comparative resource between the psychological evolved traits and the physical evolved traits 1 pinker though he mostly agrees with noam chomsky a linguist and cognitive scientist in arguing that the fact that children can learn any human language with no explicit instruction suggests that language including most of grammar is basically innate and that it only needs to be activated by interaction but pinker and bloom argue that the organic nature of language strongly suggests that it has an adaptational origin 2 by product spandrel edit chomsky spearheaded the debate on the faculty of language as a cognitive by product or spandrel as a linguist rather than an evolutionary biologist his theoretical emphasis was on the infinite capacity of speech and speaking there are a fixed number of words but there is an infinite combination of the words 3 his analysis from this considers that the ability of our cognition to perceive infinite possibilities or create infinite possibilities helped give way to the extreme complexity found in our language 3 both chomsky and gould argue that the complexity of the brain is in itself an adaptation and language arises from such complexities 3 on the issue of whether language is best seen as having evolved as an adaptation or as a by product the evolutionary biologist w tecumseh fitch following stephen j gould argues that it is unwarranted to assume that every aspect of language is an adaptation or that language as a whole is an adaptation 4 he criticizes some strands of evolutionary psychology for suggesting a pan adaptationist view of evolution and dismisses pinker and bloom s question of whether language has evolved as an adaptation as being misleading 4 he argues instead that from a biological viewpoint the evolutionary origins of language is best conceptualized as being the probable result of a convergence of many separate adaptations into a complex system a similar argument is made by terrence deacon who in the symbolic species argues that the different features of language have co evolved with the evolution of the mind and that the ability to use symbolic communication is integrated in all other cognitive processes 5 exaptation edit exaptations like adaptations are fitness enhancing characteristics but according to gould their purposes were appropriated as the species evolved there are two possible reasons the trait s original function was no longer necessary and so the trait took on a new purpose or the trait does not arise for a certain purpose but later becomes important 6 typically exaptations have a specific shape and design which becomes the space for a new function 6 the foundation of the argument comes from the low lying position of the larynx in humans 7 other mammals have the same positioning of the larynx but no other species has acquired language that leads exaptationists to see an evolved modification away from its original purpose 7 genes and language edit research has shown that genetic constraints on language evolution could have caused a specialized and species specific language module 8 it is through this module that there are many specified domain specific linguistic properties such as syntax and agreement 8 adaptationists believe that language genes coevolved with human language itself for the purpose of communication 8 this view suggests that the genes that are involved with language would only have coevolved in a very stable linguistic environment this shows that language could not have evolved in a rapidly changing environment because that type of environment would not have been stable enough for natural selection without natural selection the genes would not have coevolved with the ability for language and instead would have come from cultural conventions 8 the adaptationist belief that genes coevolved with language also suggests that there are no arbitrary properties of language this is because they would have coevolved with language through natural selection 8 the baldwin effect provides a possible explanation for how language characteristics that are learned over time could become encoded in genes he suggested like darwin did that organisms that can adapt a trait faster have a selective advantage 8 as generations pass less environmental stimuli is needed for organisms of the species to develop that trait eventually no environmental stimuli are needed and it is at this point that the trait has become genetically encoded 8 foxp2 gene edit structure of the foxp2 protein based on pymol rendering of protein data bank pdb 2ao9 main article foxp2 the genetic and cognitive components of language have long been under speculation only recently have linguists pointed out a gene that may possibly explain how language works 9 evolutionary psychologists hold that the foxp2 gene may well be associated with the evolution of human language in the 1980s psycholinguist myrna gopnik identified a dominant gene that causes language impairment in the ke family of britain the ke family has a mutation in the foxp2 that makes them suffer from a speech and language disorder it has been argued that the foxp2 gene is the grammar gene which is what allows humans the ability to form proper syntax and make our communication of higher quality children that grow up in a stable environment develop highly proficient language without any instruction individuals with a mutation to their foxp2 gene have trouble mastering complex sentences and shows signs of developmental verbal dyspraxia 9 this gene most likely evolved in the hominin line after the hominin and the chimpanzee lines split this accounts for the fact that only humans can learn and understand grammar 10 humans have a unique allele of this gene which has otherwise been closely conserved through most of mammalian evolutionary history this unique allele seems to have first appeared between 100 and 200 thousand years ago and it is now all but universal in humans 10 this suggests that speech evolved late in the overall spectrum of human evolution variation in human language edit by some classifications nearly 7000 languages exist worldwide with a great amount of variation thought to have evolved through cultural differentiation there are four factors that are thought to be the reason as to why language variation exists between cultures founder effects drift hybridization and adaptation with the vast amounts of lands available different tribes branched out to claim territory which would require new place names as well as names for new activities such as terms for new fishing techniques required in streams by a people who had previously only fished from the ocean groups that lived far apart had little or no communication even if they originally spoke the same language which allowed their languages to drift apart 11 hybridization also played a significant role in the language evolution one group would come in contact with another tribe thn the two groups would pick up words and sounds from each other which eventually leads to the formation of a new language finally adaptation would have an impact on language differentiation natural environments and cultural contexts would change over time and so the groups had to adapt to the environment and their language had to adapt to it as well for example the introduction of bronze making in an area would prompt the introduction or creation of terms related to bronze 11 atkinson theorized that language may have originated in africa since african languages have a greater variation of speech sounds than languages elsewhere those sounds are seen as the root for the other languages that exist across the world 12 communication in other animals edit research indicates that nonhuman animals such as apes dolphins and songbirds show evidence of language comparative studies of the sensory motor system reveal that speech is not special to humans nonhuman primates can discriminate between two different spoken languages 13 anatomical aspects of humans particularly the descended larynx has been believed to be unique to humans capacity to speak however further research revealed that several other mammals have a descended larynx besides humans which indicates that a descended larynx must not be the only anatomical feature needed for speech production 13 vocal imitation is not uniquely human as well 13 songbirds seem to acquire species specific songs by imitating 14 15 because nonhuman primates do not have a descended larynx they lack vocal imitative capacity which is why studies involving these primates have taught them nonverbal means of communication e g sign language 13 koko and nim chimpsky are two apes that have successfully learned to use sign language but not to the extent of human beings nim is a chimpanzee that was taken in by a family in the 1970s and was raised as if he were a human child he mastered 150 signs which were limited but useful koko was a gorilla that was taken in by a stanford student she mastered 1 000 signs for generative communication 13 see also edit essay on the origin of languages evolutionary anthropology evolutionary linguistics human evolution language acquisition linguistic anthropology linguistic universals neurobiological origins of language origin of language origin of speech origins of society physical anthropology proto human language proto language recent african origin of modern humans signalling theory sociocultural evolution symbolic culture universal grammar notes edit references edit richardson r november 1996 the prospects for an evolutionary psychology human language and human reasoning minds and machines 6 4 541 557 doi 10 1007 bf00389658 s2cid 23933943 retrieved 2 january 2014 workman lance and will reader 2004 evolutionary psychology an introduction cambridge university press p 259 1 2 3 chomsky n knowledge of language its nature origin and use praeger new york 1986 1 2 fitch w t 2011 the evolution of language new york ny cambridge university press p 15 isbn 052167736x deacon t the symbolic species 1997 1 2 botha rudolf p 2001 how much of language if any came about in the same sort of way as the brooding chamber in snails language communication 21 3 225 243 doi 10 1016 s0271 5309 01 00002 7 1 2 fitch t evolutionary developmental biology and human language evolution constraints on adaptation evolutionary biology 39 4 pp 613 30 1 2 3 4 5 6 7 chater n florencia r christiansen m h 2009 restrictions on biological adaptation in language evolution pnas 106 4 1015 1020 bibcode 2009pnas 106 1015c doi 10 1073 pnas 0807191106 pmc 2633574 pmid 19164588 1 2 fisher s e scharff c 2009 foxp2 as a molecular window into speech and language cell press pp 166 177 1 2 christianse m h kirby s 2004 language evolution oxford university press pp 215 216 1 2 levinson sc gray rd march 2012 tools from evolutionary biology shed new light on the diversification of languages trends cogn sci 16 3 167 73 doi 10 1016 j tics 2012 01 007 hdl 11858 00 001m 0000 0012 321c f pmid 22336727 s2cid 17349785 bower bruce 2011 darwin s tongues languages like genes can tell evolutionary tales science news 180 11 22 25 doi 10 1002 scin 5591801128 issn 0036 8423 1 2 3 4 5 hauser m d et al 2002 the faculty of language what is it who has it and how did it evolve science 298 pp 1569 1579 haesler s wada k nshdejan a et al march 2004 foxp2 expression in avian vocal learners and non learners j neurosci 24 13 3164 75 doi 10 1523 jneurosci 4369 03 2004 pmc 6730012 pmid 15056696 haesler s rochefort c georgi b licznerski p osten p scharff c december 2007 incomplete and inaccurate vocal imitation after knockdown of foxp2 in songbird basal ganglia nucleus area x plos biol 5 12 e321 doi 10 1371 journal pbio 0050321 pmc 2100148 pmid 18052609 external links edit language and revolutionary consciousness chris knight v t e evolutionary psychology history evolutionary thought theoretical foundations adaptationism cognitive revolution cognitivism gene selection theory modern synthesis criticism evolutionary processes acquired characteristics adaptations altruism cheating hamiltonian spite reciprocal baldwin effect by products evolutionarily stable strategy exaptation fitness inclusive kin selection inbreeding avoidance kin recognition parental investment parent offspring conflict mismatch natural selection sexual selection costly signaling male female intrasexual competition mate choice sexual dimorphism social selection species typical behavior areas cognition emotion affect display display rules facial expression behavioral modernity cognitive module modularity of mind adaptive unconscious unconscious cognition automatic and controlled processes cognitive specialization computational theory of mind domain generality domain specificity learning dual process theory cognitive tradeoff hypothesis evolution of the brain evolution of nervous systems fight or flight response arachnophobia basophobia ophidiophobia folk biology taxonomy folk psychology theory of mind intelligence flynn effect wason selection task motor control skill multitasking numerical cognition number sense approximate number system parallel individuation system sleep visual perception color vision eye naïve physics culture aesthetics literary criticism musicology anthropology biological crime language origin psychology speech morality moral foundations religion origin social contagion behavioral contagion emotional contagion epidemiology of representations universals development attachment bonding biology affectional maternal paternal bond caregiver deprivation childhood attachment cinderella effect cognitive development education neuronal recycling hypothesis science of reading language acquisition personality development socialization human factors mental health cognitive ergonomics computer mediated communication engineering psychology human computer interaction me...