It is now nearly twenty years since Noam Chomsky's Syntactic Structures appeared, and during these twenty years many things have changed in linguistics—not least, the interest that the rest of the world now takes in what we linguists do. The reason for this is clearly because Chomsky claimed to have discovered a window into the human mind, via the study of the structure of languages. The argument is a simple one: a linguist can write a grammar for a language, with some degree of confidence that his grammar is the “ right “ one for that language, but since the language only exists in the heads of its speakers until linguists or other grammar-writers come along, the grammar that he has written must correspond in some direct sense, and in detail, to the knowledge that exists in the speaker's mind. Therefore, in order to study that particular part of our minds, all we need to do is to write grammars, making sure that they are right, of course, and then study the grammars instead. “We can also compare the grammars for radically different languages and see to what extent they are similar or different, and then draw conclusions about general properties of all human beings’ minds— and we can even speculate as to how our minds have developed that way, whether by genetic programming or by other means. It is no wonder that linguists are not the only people who think linguistics is important.