Merritt Ruhlen
Merritt Ruhlen (May 10, 1944 – January 29, 2021) was an American linguist who worked on the classification of languages and what this reveals about the origin and evolution of modern humans. Amongst other linguists, Ruhlen's work was recognized as standing outside the mainstream of comparative-historical linguistics. He was the principal advocate and defender of Joseph Greenberg's approach to language classification.