Born 5 May 1707,3 Postlethwayt was elected a Fellow of the Society of Antiquaries of London on 21 March 1734.4 In 1743 he secured a position with the Royal Africa Company, and elected to its Court of Assistants (governing board) 17 January 1744. He wrote in the company's defence over the next two years.5
Postlethwayt died suddenly on 13 September 1767 aged 60. He was buried in the Old Street churchyard, in Clerkenwell, north London.6
Postlethwayt spent 20 years preparing The Universal Dictionary of Trade and Commerce, London, 1751 (3rd edit. London, 1766; 4th edit. London, 1774), a translation, with large additions, from the French work of Jacques Savary des Brûlons. Postlethwayt drew on Savary's work and Richard Cantillion as well as other writers of the day, and clarified how economic theory applied to economic and political issues current then.7
Postlethwayt also published:
Trinidadian historian Eric Williams cited the works of Postlethwayt on the slave trade in his seminal work Capitalism and Slavery (1944).10
E.A.J. Johnson devotes a chapter in his work Predecessors of Adam Smith: The Growth of British Economic Thought (1937, reprint 1960) to Malachy Postlethwayt, Postlethwayt, the Publicist, p. 185-205.11
This article incorporates text from a publication now in the public domain: "Postlethwayt, Malachy". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
Adam Smith Review Volume 4 by Vivienne Brown p.196 https://books.google.com/books?id=od29ibaLonYC&pg=PA196 ↩
Rediker, Marcus (2007). The slave ship : a human history. New York: Viking. ISBN 978-0-670-01823-9. OCLC 124074808. 978-0-670-01823-9 ↩
Bennett, Robert J. (12 April 2011). "Malachy Postlethwayt 1707-67: Genealogy and Influence of an Early Economist and 'Spin-Doctor'" (PDF). Genealogists' Magazine. 1: 1–8. https://www.geog.cam.ac.uk/people/bennett/malachypostlethwayt.pdf ↩
"Postlethwayt, Malachy" . Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900. https://en.wikisource.org/wiki/Dictionary_of_National_Biography,_1885-1900/Postlethwayt,_Malachy ↩
Christopher Leslie Brown, Moral Capital: foundations of British abolitionism (2006), p. 270;Google Books. https://books.google.com/books?id=TaI--qgb1QcC&pg=PA270 ↩
Emory R. Johnson, T. W. Van Metre, G. G. Huebner, D. S. Hanchett, History of Domestic and Foreign Commerce of the United States - Vol. 1, p.36–37 Carnegie Institution of Washington, 1915. https://www.questia.com/library/480602/history-of-domestic-and-foreign-commerce-of-the-united ↩
Groenewegen, Peter. "Postlethwayt, Malachy". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/22599. (Subscription or UK public library membership required.) /wiki/Dictionary_of_National_Biography#Oxford_Dictionary_of_National_Biography ↩
Johnson, E.A.J (1937). Predecessors of Adam Smith; the growth of British economic thought. New York: Prentice-Hall, Inc. pp. 185–205. ↩