
Letter to Sheridan (November 1864)
1860s, 1864
Source: 1920s, Science and the Modern World (1925), Ch. 1: "The Origins of Modern Science"
Context: The new tinge to modern minds is a vehement and passionate interest in the relation of general principles to irreducible and stubborn facts. All the world over and at all times there have been practical men, absorbed in 'irreducible and stubborn facts'; all the world over and at all times there have been men of philosophic temperament, who have been absorbed in the weaving of general principles. It is this union of passionate interest in the detailed facts with equal devotion to abstract generalisation which forms the novelty of our present society.
Letter to Sheridan (November 1864)
1860s, 1864
"On The Natural Inequality of Men" (January 1890)
1890s
p, 125
"On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856)
Speech in the House of Commons (11 November 1947), published in 206–07 The Official Report, House of Commons (5th Series), 11 November 1947, vol. 444, cc. http://hansard.millbanksystems.com/commons/1947/nov/11/parliament-bill#column_206
Post-war years (1945–1955)
volume III, chapter I: "The Spread of Evolution", page 18 http://darwin-online.org.uk/content/frameset?pageseq=30&itemID=F1452.3&viewtype=image; letter to Joseph Hooker (1871)
The Life and Letters of Charles Darwin (1887)