We go back in history and discuss the historical dimension of sociolinguistics. We focus on life in the British Isles in the Early Modern period and discover that most of the British population spoke regional and social varieties. As a result of profound changes in society, the history of English is manifold and more diverse than is suggested by a Standard-oriented lens only. We look into language standardization in Late Modern England (1600–1900) and discuss the validity of data, as special care needs to be taken when assessing written data from times when education and schooling were a rare privilege. We present English language ideologies in general, particularly relating to standardization and the persistence of dialect variation. We end with a presentation of groundbreaking studies in English historical sociolinguistics to show how one can gain insights into variation and change despite methodological challenges.