The following events related to sociology occurred in the 1840s.
- Engels and Marx's The Communist Manifesto is published
- Study group on the social question held attended by Frederic Le Play, Jean Reynaud, Lamartine, François Arago, Carnot, Lanjuinais, Tocqueville, Montalembert, Sainte-Beuve, Agénor de Gasparin, Abbé Dupanloup, Adolphe Thiers, Auguste Cochin, Charles Dupin and others
- ^ "Project Gutenberg's Cours de philosophie positive, vol 5/6, by Auguste Comte". Project Gutenberg. 23 August 2016. Archived from the original on 2019-02-22. Retrieved 2021-07-25.
- ^ "Project Gutenberg's Cours de philosophie positive, vol. 6/6, by Auguste Comte". Project Gutenberg. 28 December 2015. Archived from the original on 2019-02-22. Retrieved 2021-07-25.
- ^ "Søren Kierkegaard | Danish philosopher". Encyclopedia Britannica. Retrieved 2021-07-25.
- ^ Mill, John Stuart (1843). A system of logic : ratiocinative and inductive, being a connected view of the principles of evidence, and the methods of scientific investigation. Vol. 1. London: London : John W. Parker.
- ^ Mill, John Stuart (1843). A System of Logic, Ratiocinative and Inductive: Being a Connected View of ... Vol. 2. London: John W. Parker, WestStrand.