1840s in sociology

The following events related to sociology occurred in the 1840s. Pierre-Joseph Proudhon's What is Property? is published. Auguste Comte published Volume 5 of The Course of Positive Philosophy: La Partie Historique De La Philosophie Sociale 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 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. 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. Friedrich Engels' Conditions of the Working Class in England (original German edition) is published 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 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. 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 Søren Kierkegaard's The Sickness Unto Death is published.