The following events related to sociology occurred in the 1870s.
1871 Pierre Guillaume Frédéric le Play's Le Organisation de Famille is published. Carl Menger's Principles of Economics is published. Lewis Henry Morgan's Systems of Consanguinity and Affinity of the Human Family is published. Sir Edward Burnett Tylor's In Primitive Culture is published.
1873 Herbert Spencer's The Study of Sociology is published.
1874 Francis Galton's English men of science : their nature and nurture is published. Pierre Guillaume Frédéric Le Play's La réforme sociale en France déduite de l’observation comparée des peuples Européens is published. Henry Sidgwick's The Method of Ethics is published.
1875 Francis Galton's Statistics by intercomparison, with remarks on the law of frequency of error is published. Frederic Harrison's Order and Progress is published.
1878 Friedrich Engels' Anti-Dühring is published.
1879 Henry George's, Progress and Poverty is published.
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