b. 1927
William Labov (born 1927) is an American linguist widely regarded as the founder of variationist sociolinguistics, pioneering empirical methods for studying language variation and change in living speech communities. Though primarily a linguist rather than a philosopher, Labov has engaged directly with philosophy of language debates, notably arguing against Jerrold Katz's Platonist account of linguistic objects as abstract entities. His work challenges idealized, mentalist, and abstract-object theories of language in favor of socially embedded, empirical approaches.
Founded variationist sociolinguistics, establishing systematic empirical methods for studying language change in progress
Demonstrated that linguistic variation is structured and rule-governed, not random, in works such as The Social Stratification of English in New York City (1966)
Challenged Chomskyan idealization of linguistic competence by insisting on the primacy of actual language use
Critiqued Platonist accounts of linguistic ontology, including Katz's argument that languages are abstract objects
Developed foundational principles for the study of African American Vernacular English, with significant cultural and educational implications