by Ehret from the early 1990s. Recent years In recent years Ehret has carried his work in several new directions. One of these has been the history and evolution of early human kinship systems. A second interest has been to apply the methods of historical reconstruction from linguistic evidence to issues in anthropological theory and in world history. He has also collaborated with geneticists in seeking to correlate linguistic with genetic findings (e.g., Sarah A. Tishkoff, Floyd A. Reed, F. R. Friedlaender, Christopher Ehret, Alessia Ranciaro, et al., "The Genetic Structure and History of Africans and African Americans", Science 324, 22 May 2009) and in developing mathematical tools for dating linguistic history (e.g., Andrew Kitchen, Christopher Ehret, Shiferew Assefa, and Connie Mulligan, "Bayesian phylogenetic analysis of Semitic languages identifies an Early Bronze Age origin of Semitic in the Near East," Proceedings of the Royal Society B: Biological Sciences, July 2009). Books The Civilizations of Africa: A History to 1800. Second Edition. Charlottesville: University of Virginia Press, 2016. A Dictionary of Sandawe: The Lexicon and Culture of a Khoesan People of Tanzania. (C. Ehret and Patricia Ehret, eds.) Köln: Rüdiger Köppe Verlag, 2012. History and the Testimony of Language. Berkeley, Los Angeles, London: University of California Press, 2011. The Civilizations of Africa: A History to 1800. Charlottesville: University Press of Virginia, 2002. A Historical-Comparative Reconstruction of Nilo-Saharan. Cologne: Rüdiger Köppe Verlag, 2001. An African Classical Age: Eastern and Southern Africa in World History, 1000 B.C. to A.D. 400. Charlottesville: University Press of Virginia, 1998. Reconstructing Proto-Afroasiatic (Proto-Afrasian): Vowels, Tone, Consonants, and Vocabulary. Berkeley, Los Angeles: University of California Press, 1995. The Archaeological and Linguistic Reconstruction of African History. (C. Ehret and M. Posnansky, eds.) Berkeley, Los Angeles: University of California Press, 1982. The Historical Reconstruction of Southern Cushitic Phonology and Vocabulary. Berlin: Reimer, 1980. Ethiopians and East Africans: The Problem of Contacts. Nairobi: East African Publishing House, 1974. Southern Nilotic History: Linguistic Approaches to the Study of the Past. Evanston, IL: Northwestern University Press, 1971. References External links His works A Conversation with Christopher Ehret, World History Connected Vol. 2 No. 1 (November 2004) Reviews of An African Classical Age, 2007 University of California, Los Angeles faculty Linguists of Khoisan languages Historians of Africa Living people 21st-century American historians American male non-fiction writers Paleolinguists Linguists of Nilo-Saharan languages Linguists of Afroasiatic languages 1941 births Historical linguists Historians from California 21st-century American