Language is a human instinct.   All societies have complex language, and everywhere the languages use the same kinds of grammatical machinery like nouns, verbs, auxiliaries, and agreement. All normal children develop language without conscious effort or formal lessons, and by the age of three they speak in  fluent  grammatical  sentences, outperforming the most sophisticated computers. Brain damage or congenital conditions can make a person a linguistic savant while severely retarded, or unable to speak normally (...) despite high intelligence. All this has led many scientists,  beginning with the linguist Noam Chomsky in the late 1950's, to conclude that there are specialized circuits in the human brain, and perhaps specialized genes, that create the gift of articulate speech.Â. (shrink)