Joseph H.Greenberg (1915-2001) was one of the twentieth-century's most original and influential linguists. He was Professor of Linguistics at Stanford University, 1962-85, where he was also Director of the African Languages and Area Center, 1967-78. His books include The Languages of Africa (1963), Anthropological Linguistics (1968) Language Typology: A Historical and Analytic Overview (1974), Language in the Americas (1987), and Indo-European and its Closest Relatives: The Eurasiatic Language Family (2000/2002).
William Croft received his Ph.D. in linguistics at Stanford University in 1986. His publications include Typology and Universals (1990), Syntactic Categories and Grammatical Relations (1991), Studies in Typology and Diachrony (coedited with Keith Denning and Suzanne Kemmer, 1990), Explaining Language Change: An Evolutionary Approach (2000), and a large number of scholarly articles. His current research areas include syntax, semantics, typology, and historical linguistics. Forthcoming books include Cognitive Linguistics (with D. Alan Cruse) and Verbs: Aspect and Argument Structure.