Jean van Heijenoort
Throughout his life, he maintained strong connections with his extended family and friends in France, making biannual visits after he obtained American citizenship in 1958.After Trotsky was exiled, he hired van Heijenoort as a secretary and bodyguard, primarily because of his fluency in French, Russian, German, and English.In New York, he worked for the Socialist Workers Party (US) (SWP) and wrote a number of articles for the American Trotskyist press and other radical outlets.It begins with the first complete translation of Frege's 1879 Begriffsschrift, followed by 45 short pieces on mathematical logic and axiomatic set theory, originally published between 1889 and 1931.Each piece was supplied with editorial footnotes and an introduction (mostly by Van Heijenoort but some by Willard Quine and Burton Dreben); its references were combined into a comprehensive bibliography, and misprints, inconsistencies, and errors were corrected.Much of the history of that stance, whose leading lights include George Boole, Charles Sanders Peirce, Ernst Schröder, Leopold Löwenheim, Thoralf Skolem, Alfred Tarski, and Jaakko Hintikka, is covered in Brady (2000).