Data are drawn from existing typologies, from the results of a survey of various phonological patterns in the 100-language sample from the World Atlas of Language Structures, and from corpora of individual languages. Matthew Gordon analyses these data and explores the correlations between different - often superficially unrelated - phonological properties to gain insight into the driving forces behind these phenomena. He provides an overview of synchronic and diachronic explanations for the patterns observed and discusses how formal phonological theory has attempted to model the typological data. One of relatively few typological works devoted to phonology, this book will be a valuable resource for phonologists and phoneticians from advanced undergraduate level upwards, as well all those with an interest in language typology.