William Labov
William David Labov ( lə-BOHV; December 4, 1927 – December 17, 2024) was an American linguist widely regarded as the founder of the discipline of variationist sociolinguistics. He has been described as "an enormously original and influential figure who has created much of the methodology" of sociolinguistics, and "one of the most influential linguists of the 20th and 21st centuries".