Within linguistics, the formal and functional approaches each offer insight into what language might be and how it operates, but so far, there have been hardly any systematic attempts to integrate them into a single theory. This book explores the relationship between universal grammar - the theory that we have an innate mechanism for generating sentences - and iconicity - the resemblance between form and meaning in language. It offers a new theory of their interactions, 'UG-iconicity interface' (UG-I), which shows that not only do universal grammar and iconicity coexist, but in fact...