This book traces the spread of the perfect tense across Europe, demonstrating the crucial role of language contact.This book provides an in-depth analysis of the role of language contact as a motivator for change. It will appeal to students and researchers of historical linguistics, contact linguistics, language typology, and sociolinguistics, as well as to specialists in Romance, Germanic, Slavic, and other language families of Europe.This book provides an in-depth analysis of the role of language contact as a motivator for change. It will appeal to students and researchers of historical linguistics, contact linguistics, language typology, and sociolinguistics, as well as to specialists in Romance, Germanic, Slavic, and other language families of Europe.This comprehensive new work provides extensive evidence for the essential role of language contact as a primary trigger for change. Unique in breadth, it traces the spread of the periphrastic perfect across Europe over the last 2,500 years, illustrating at each stage the micro-responses of speakers and communities to macro-historical pressures. Among the key forces claimed to be responsible for normative innovations in both eastern and western Europe is 'roofing' - the superstratal influence of Greek and Latin on languages under the influence of Greek Orthodoxy and Roman Catholicism respectively. The author provides a new interpretation of the notion of 'sprachbund', presenting the model of a three-dimensional stratified convergence zone, and applies this model to her analysis of the have and be perfects within the Charlemagne sprachbund. The book also tackles broader theoretical issues, for example, demonstrating that the perfect tense should not be viewed as a universal category.1. Language contact in Europe: the periphrastic perfect through history; 2. Languages in contact, areal linguistics and the perfect; 3. The perfect as a category; 4. Sources of the perfect in Indo-European; 5. The periphrastic perfect in Gl3(