1840s in sociology

The following events related to sociology occurred in the 1840s.

1840

 * Pierre-Joseph Proudhon's What is Property? is published.

1841

 * Auguste Comte published Volume 5 of The Course of Positive Philosophy: La Partie Historique De La Philosophie Sociale

1842

 * Auguste Comte publishes Volume 6 of The Course in Positive Philosophy: Le Complément De La Philosophie Sociale Et Les Conclusions Générales, completing the series.
 * Auguste Comte's Sociologie Comme Instruction Affirmative is published
 * Auguste Comte's Social Statics and Social Dynamics is published

1843

 * Søren Kierkegaard's Either/Or is published in two volumes.
 * John Stuart Mill's A System of Logic, Ratiocinative and Inductive is published in two volumes.

1844

 * Friedrich Engels' Outline of A Critique of Political Economy is published
 * Engels and Marx's The Holy Family is published
 * Karl Marx's Economic and Philosophic Manuscripts are written.
 * Max Stirner's The Ego and Its Own is published in German.

1845

 * Friedrich Engels' Conditions of the Working Class in England (original German edition) is published

1846

 * Marx and Engels' The German Ideology is written.
 * Pierre Joseph Proudhon's The System of Economic Contradictions or the Philosophy of Poverty is published
 * Søren Kierkegaard's Two Ages: A Literary Review is published

1847

 * Friedrich Engels' The Principles of Communism is written during October–November
 * Karl Marx's The Poverty of Philosophy is published, a critique of Proudhon's 1846 work.

1848

 * 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

1849

 * Søren Kierkegaard's The Sickness Unto Death is published.