Walter Bagehot (1873). “Physics and Politics: Or, Thoughts on the Application of the Principles of "natural Selection" and "inheritance" to Political Society”, p.61
"The Struggle Intensifies". Aleksandr Solzhenitsyn's open letter to the Fourth Soviet Writers' Congress (May 16, 1967) as translated in "Solzhenitsyn: A Documentary Record" edited by Leopold Labedz, 1970.