Andre Gunder Frank (February 24, 1929 – April 25, 2005) was a German-American sociologist and economic historian who promoted dependency theory after 1970 and world-systems theory after 1984. He employed some Marxian concepts on political economy, but rejected Marx's stages of history, and economic history generally. Biography Frank was born in Germany to, pacifist writer Leonhard Frank and his second wife Elena Maqenne Penswehr, but his family fled the country when the Nazis came to power. Frank received schooling in several places in Switzerland, where his family settled, until they emigrated to the United States in 1941. Frank's undergraduate studies were at Swarthmore College, founded as a Quaker college from which he gained an Economics degree in 1950. He earned his PhD in economics in 1957 at the University of Chicago. His doctorate was a study of Soviet agriculture entitled Growth and Productivity in Ukrainian Agriculture from 1928 to 1955. Ironically, his dissertation supervisor was Milton Friedman, a man whose laissez faire approach to economics Frank would later harshly criticize. Throughout the 1950s and early 1960s Frank taught at American universities. In 1962 he moved to Latin America, inaugurating a remarkable period of travel that confirmed his peripatetic tendencies. His most notable work during this time was his stint as Professor of Sociology and Economics at the University of Chile, where he was involved in reforms under the socialist government of Salvador Allende. After Allende's government was toppled by a coup d'état in 1973, Frank fled to Europe, where he occupied a series of university positions. From 1981 until his retirement in 1994 he was professor in developmental economy at the University of Amsterdam. He was married to Marta Fuentes, with whom he wrote several studies about social movements, and with Marta he had two sons. Marta died in Amsterdam in June 1993. His second wife was sociologist Nancy Howell, a friend for forty years: while married to her, they lived in Toronto. Frank died in 2005 of complications related to his cancer while under the care of his third wife, Alison Candela. Works and ideas During his career, Frank taught and did research in departments of anthropology, economics, geography, history, international relations, political science, and sociology. He worked at nine universities in North America, three in Latin America, and five in Europe. He gave countless lectures and seminars at dozens of universities and other institutions all around the world