had the "3Ms" a man needs to sustain himself: Marriage (his wife, Saly Ruth Ramler, was not alive anymore though when he turned one hundred in 1994), Mathematics and Marxism. During the mid-1950s McCarthy era, Struik's Marxist opinions led to accusations he was a of being a spy for the Soviet Union. He was also cited as an instance of "subversive influence" in a 1952 Senate committee publication. He denied the allegations, and was called Called before the House Un-American Activities Committee. Struik refused to answer any of the over 200 questions asked of him, repeatedly invoking the First and Fifth Amendments of the U.S. Constitution. He was suspended from teaching for five years (with full salary) by MIT in the 1950s. Struik was re-instated in 1956. He retired from MIT in 1960. Aside from purely academic work, Struik also helped found the journal Science & Society, a Marxian journal on the history, sociology and development of science. In 1950 Struik published his Lectures on Classical Differential Geometry, which gained praise from Ian R. Porteous: Of all the textbooks on elementary differential geometry published in the last fifty years the most readable is one of the earliest, namely that by D.J. Struik (1950). He is the only one to mention Allvar Gullstrand. Struik's other major works include such classics as A Concise History of Mathematics (1948), Yankee Science in the Making, The Birth of the Communist Manifesto, and A Source Book in Mathematics, 1200–1800, all of which are considered standard textbooks or references. Struik died October 21, 2000, three weeks after celebrating his 106th birthday. Books 1928: Het Probleem ‘De impletione loci’ (Dutch), Nieuw Archief voor Wiskunde, Series 2, 15 (1925–1928), no. 3, 121–137 1948: Yankee Science in the Making 1950: Lectures on Classical Differential Geometry 1953: Lectures on Analytic and Projective Geometry, Addison-Wesley 1957: The Origins of American Science (New England) via Internet Archive 1986: (editor) A Source Book in Mathematics, 1200–1800, Princeton University Press , (pbk). 1987: A Concise History of Mathematics, fourth revised edition, Dover Publications , . References Sources Obituaries G. Alberts, and W. T. van Est, Dirk Jan Struik, Levensberichten en herdenkingen (Koninklijke Nederlandse Akademie van Wetenschappen, 2002), pp. 107–114. MIT News Office (2000-10-25). Mathematician Professor Dirk Struik dies at 106. Massachusetts Institute of Technology, accessed 2007-07-23 External links zbmath Dirk Jan Struik Dirk Jan Stuik from Tufts University 20th-century Dutch mathematicians Historians of science