This handbook comprehensively examines social interaction by providing a critical overview of the field of linguistic politeness and impoliteness. Authored by over forty leading scholars, it offers a diverse and multidisciplinary approach to a vast array of themes that are vital to the study of interpersonal communication. The chapters explore the use of (im)politeness in specific contexts as well as wider developments, and variations across cultures and contexts in understandings of key concepts (such as power, emotion, identity and ideology). Within each chapter, the authors select a topic and offer a critical commentary on the key linguistic concepts associated with it, supporting their assertions with case studies that enable the reader to consider the practicalities of (im)politeness studies. This volume will be of interest to students and scholars of linguistics, particularly those concerned with pragmatics, sociolinguistics and interpersonal communication. Its multidisciplinary nature means that it is also relevant to researchers across the social sciences and humanities, particularly those working in sociology, psychology and history.