Noam Chomsky is one of the most influential figures in linguistic, and his ideas about how language is acquired and how it is stored in the mind sparked a revolution in many aspects of linguistic and psychology, including the study of language acquisition. A central part of his thinking is that all human language are fundamentally innate and that the same universal principles underlie all of them, IN his 1959 review of B.F. Skinner’s book Verbal Behavior, Chomsky challenged the behaviologically programmed for language and that language develops in the child in just the same way that other biological functions develop. For example, every child will learn to walk as long as adequate nourishment and reasonable freedom of movement are provided. The child does not have to be taught, most children learn to walk at about the same age, and walking is essentially the same in all normal human beings. For Chomsky, language acquisition is very similar. The environment makes only a basic contribution-in this case, the availability of people who speak to the child, the child, or rather, the child’s biological endowment, will do the rest.