Innateness is one of the central concepts of cognitive science; but it is also a source of considerable confusion. In this article, I survey recent attempts to understand the notion of innateness as it figures in cognitive science and indicate which is likely to prove most fruitful. One approach draws directly on our "commonsense" views about innate traits. Another aims to characterize innateness in terms of concepts drawn from biology, such as genetic determination. Yet neither strategy has met with much success. This could indicate that a satisfactory account of innateness needs to make use of the conceptual resources of cognitive science itself. A proposal that takes this suggestion seriously is outlined, and an appeal is made for a more systematic assessment of the role and significance of the notion of innateness to cognitive science.