This condensed review of recent trends and developments in historical linguistics proceeds from the empirical to the conceptual, from ‘what’ to ‘how’ to ‘why’. I begin with new findings about the origins, relationships, and diversity of the world’s languages, then turn to the processes and mechanisms of change as they concern practicing historical linguists, continue with efforts to ground change in the acquisition, use, and structure of language, and conclude with a look at ongoing debates concerning the explanatory division of (...) labor between historical and theoretical linguistics and ways to unify historical and theoretical linguistics. The emphasis throughout is on current research rather than on established textbook knowledge. (shrink)