This volume brings together an international group of linguists from a diverse range of research backgrounds to explore the cycles of change in the world's languages. Historical linguistics does not solely focus on reconstructing a language's linguistic past and exploring the mechanisms underlying previous language changes; it also addresses broader questions concerning the development and ongoing evolution of language. The chapters in this book draw on data both from languages from the distant past, such as Hittite, Proto-Turkic, and Proto-Bantu, and from present-day languages including Akan, Cantonese, Kuuk Thaayorre, Seliš-Ql'ispé, Nivaclé, and Spanish. The contributions showcase current research in historical linguistics and exemplify the dynamism and inherently interdisciplinary nature of the field.