valuables to steal." Upton Sinclair, in One Clear Call, 1948, quips that "Huxley said that Herbert Spencer's idea of a tragedy was a generalization killed by a fact; ..." Primary sources Papers of Herbert Spencer in Senate House Library, University of London Education (1861) System of Synthetic Philosophy, in ten volumes First Principles (1862) Principles of Biology (1864, 1867; revised and enlarged: 1898), in two volumes Volume I – Part I: The Data of Biology; Part II: The Inductions of Biology; Part III: The Evolution of Life; Appendices Volume II – Part IV: Morphological Development; Part V: Physiological Development; Part VI: Laws of Multiplication; Appendices Principles of Psychology (1870, 1880), in two volumes Volume I – Part I: The Data of Psychology; Part II: The Inductions of Psychology; Part III: General Synthesis; Part IV: Special Synthesis; Part V: Physical Synthesis; Appendix Volume II – Part VI: Special Analysis; Part VII: General Analysis; Part VIII: Congruities; Part IX: Corollaries Principles of Sociology, in three volumes Volume I (1874–75; enlarged 1876, 1885) – Part I: Data of Sociology; Part II: Inductions of Sociology; Part III: Domestic Institutions Volume II – Part IV: Ceremonial Institutions (1879); Part V: Political Institutions (1882); Part VI [published here in some editions]: Ecclesiastical Institutions (1885) Volume III – Part VI [published here in some editions]: Ecclesiastical Institutions (1885); Part VII: Professional Institutions (1896); Part VIII: Industrial Institutions (1896); References Principles of Ethics, in two volumes Volume I – Part I: The Data of Ethics (1879); Part II: The Inductions of Ethics (1892); Part III: The Ethics of Individual Life (1892); References Volume II – Part IV: The Ethics of Social Life: Justice (1891); Part V: The Ethics of Social Life: Negative Beneficence (1892); Part VI: The Ethics of Social Life: Positive Beneficence (1892); Appendices The Study of Sociology (1873, 1896) An Autobiography (1904), in two volumes See also v1 Life and Letters of Herbert Spencer by David Duncan (1908) v2 Life and Letters of Herbert Spencer by David Duncan (1908) Descriptive Sociology; or Groups of Sociological Facts, parts 1–8, classified and arranged by Spencer, compiled and abstracted by David Duncan, Richard Schepping, and James Collier (London, Williams & Norgate, 1873–1881). Essay Collections: Illustrations of Universal Progress: A Series of Discussions (1864, 1883) The Man Versus the State (1884) Essays: Scientific, Political, and Speculative (1891), in three volumes: Volume I (includes "The Development Hypothesis," "Progress: Its Law and