The papers in this collection, drawn from the 34th Annual Conference of the British Association for Applied Linguistics, reflect a number of different perspectives within the field of applied linguistics at the start of the twenty-first century. While addressing the theme of unity and diversity, each paper prompts critical reflection on tensions within the discipline between stability and change, consensus and controversy, similarity and variation. The interpretation of language use is broad and varied, taking both macro- and micro-perspectives. Topics addressed range from issues of global...