The background; 0. Preface: What we’re doing here and why; 1. Introduction: What is sound change and how can we understand it?; 2. The history of the field and why you need to understand it; Starting points; 3. Segmental sound change; 4. Sound change beyond the segment; 5. Evidence for sound change; Where sound changes; 6. The learner; 7. Society; Sound change in grammar; 8. Phonetics and sound change; 9. Phonology and sound change; 10. Sound change beyond the sound system; The bigger picture; 11. Conclusion: Toward a synthesis; References; Index of languages and families; Index of subjects