Question: What nationality was the author of Black Earth: The Holocaust as History and Warning?

Context paragraphs:
Terramare culture: Terramare, Terramara, or Terremare is a technology complex mainly of the central Po valley, in Emilia-Romagna, Northern Italy, dating to the Middle and Late Bronze Age ca. 1700–1150 BC.  It takes its name from the "black earth" residue of settlement mounds.  "Terramare" is from "terra marna", "marl-earth", where marl is a lacustrine deposit.  It may be any color but in agricultural lands it is most typically black, giving rise to the "black earth" identification of it.  The population of the terramare sites is called the terramaricoli.  The sites were excavated exhaustively in 1860–1910.

Central Black Earth Oblast: Central Black Earth Oblast (Russian: Центрально-Чернозёмная область , "Tsentralno-Chernozyomnaya Oblast") was an "oblast" (a first-level administrative and municipal unit) of the Russian Soviet Federative Socialist Republic from 1928 to 1934.  Its seat was in the city of Voronezh.  The oblast was located in the center of European Russia, and its territory is currently divided between Voronezh, Oryol, Kursk, Belgorod, Lipetsk, and Tambov Oblasts, as well as a minor part of Penza Oblast.  The geographical territory is former Oblast does not currently have any administrative significance, but is often referred to as Central Black Earth Region.

Black Earth: The Holocaust as History and Warning: Black Earth: The Holocaust as History and Warning is a 2015 book by historian Timothy D. Snyder.

Black Earth, Wisconsin: Black Earth is a village in Dane County, Wisconsin, United States.  The population was 1,338 at the 2010 census.  The village is located within the Town of Black Earth.  It is part of the Madison Metropolitan Statistical Area.

Terra preta: Terra preta (] , locally ] , literally "black soil" in Portuguese) is a type of very dark, fertile manmade (anthropogenic) soil found in the Amazon Basin.  It is also known as "Amazonian dark earth" or "Indian black earth".  In Portuguese its full name is "terra preta do índio" or terra preta de índio ("black soil of the Indian", "Indians' black earth").  "Terra mulata" ("mulatto earth") is lighter or brownish in color.

Black Earth (Bohren &amp; der Club of Gore album): Black Earth is the fourth album by the jazz/ambient band Bohren & der Club of Gore.  "Black Earth" was re-released on the American label Ipecac Recordings in 2004, increasing the band's exposure in the United States.  The record has been re-released in 2016 by PIAS Recordings.

Joshua D. Zimmerman: Joshua D. Zimmerman (born 1966) is Professor of History at Yeshiva University, where he holds the Eli and Diana Zborowski Professorial Chair in Interdisciplinary Holocaust Studies.  He is the author of "The Polish Underground and the Jews, 1939-1945" by Cambridge University Press (2015, hardback) and of "Contested Memories.  Poles and Jews during the Holocaust and Its Aftermath" by Rutgers University Press (2003, hardcover) as well as "Poles, Jews and the Politics of Nationality: The Jewish Labor Bund and the Polish Socialist Party in Late Czarist Russia, 1892–1914." <ref name="yu.edu/faculty"> </ref> Zimmerman graduated from the University of California at Santa Cruz in 1989 with a BA(Hons) in History, and with the M.A. in History from UCLA in 1993.  In February 1998 he completed his PhD thesis in Comparative History at Brandeis University, and in the summer 2004 was appointed to the position of Associate Professor of History at Yeshiva University in New York City.  Zimmerman is an American author proficient in Yiddish, Polish, Hebrew, Russian, and French. <ref name="yu.edu/cv"> </ref>

Glutinoglossum glutinosum: Glutinoglossum glutinosum, commonly known as the viscid black earth tongue or the glutinous earthtongue, is a species of fungus in the family Geoglossaceae (the earth tongues).  Widely distributed in the Northern Hemisphere, it has been found in northern Africa, Asia, Europe, and North America.  Although previously thought to exist in Australasia, collections made from these locations have since been referred to new species.  "G. glutinosum" is a saprophytic species that grows on soil in moss or in grassy areas.  The smooth, nearly black, club-shaped fruitbodies grow to heights ranging from 1.5 to .  The head is up to 0.7 cm long, and the stipes are sticky.  Several other black earth tongue species are quite similar in external appearance, and many can be reliably distinguished only by examining differences in microscopic characteristics, such as spores, asci, and paraphyses.  First described in 1796 as a species of "Geoglossum", the fungus has gone through several changes of genera in its taxonomic history.  It was placed in its current genus, "Glutinoglossum", in 2013.

Central Black Earth Region: Central Black Earth Region or Central Chernozem Region or Chernozemie (Russian: Центрально-черноземная область, Центральная черноземная область, Центрально-черноземная полоса ) is a segment of the Eurasian chernozem belt that lies within Central Russia and comprises Voronezh Oblast, Lipetsk Oblast, Belgorod Oblast, Tambov Oblast, Oryol Oblast and Kursk Oblast.  Between 1928 and 1934, these regions were briefly united into Central Black Earth Oblast, with the centre in Voronezh.

Timothy D. Snyder: Timothy David Snyder (born August 18, 1969) is an American author, historian and academic specializing in the history of Central and Eastern Europe, and the Holocaust.  He is the Richard C. Levin Professor of History at Yale University and a Permanent Fellow at the Institute for Human Sciences in Vienna.  Snyder is a member of the Council on Foreign Relations and the Committee on Conscience of the United States Holocaust Memorial Museum.

Supporting paragraphs: Black Earth: The Holocaust as History and Warning Timothy D. Snyder
Answer: American