The primary goal of Evolutionary Phonology is to explain recurrent sound patterns in spoken languages across time and space. One domain of explanation is diachronic, and much of my own work has focused on diachronic explanations (e.g. Blevins 2004, 2006a, To appear a, To appear b, To appear c, this volume). Another domain of explanation is synchronic. A range of synchronic factors, from the mec...