For Chomsky the nature of the human mind is revealed by the nature of language. Not only because language is a uniquely human activity, but also because language ‘is the vehicle of thought’ and therefore uniquely placed to illuminate the essence of the human mind. It should be understood that by ‘mind’, Chomsky means the cognitive principles and processes that underlie human behaviour and that Chomsky firmly holds to an ‘innatist’ theory reminiscent of Leibniz and others.