“The Communists base themselves on rich historical experience which teaches that obsolete classes do not voluntarily abandon the stage of history.”
“Stalin-Wells Talk: The Verbatim Report and A Discussion”, G.B. Shaw, J.M. Keynes et al., London, The New Statesman and Nation, (1934) p. 13
Stalin's speeches, writings and authorised interviews
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Joseph Stalin 95
General secretary of the Communist Party of the Soviet Union 1879–1953Related quotes

Wallace v. Jaffree, 472 U.S. 38 (1985) ( dissenting opinion http://straylight.law.cornell.edu/supct/html/historics/USSC_CR_0472_0038_ZD2.html).
Judicial opinions
Source: Something More, A Consideration of the Vast, Undeveloped Resources of Life (1920), p. 45
Context: Jesus teaches the kinship and equality of all children of God. No division of race or color, class or caste, rich or poor, male or female, is found in the teaching of Jesus.

"Report on the Activities of the Council of People’s Commissars" (24 January 1918); Collected Works, Vol. 26, pp. 459-61.
1910s

On Contradiction (1937)
Original: (zh-CN) 共产党内正确思想和错误思想的矛盾,如前所说,在阶级存在的时候,这是阶级矛盾对于党内的反映。这种矛盾,在开始的时候,或在个别的问题上,并不一定马上表现为对抗性的。但随着阶级斗争的发展,这种矛盾也就可能发展为对抗性的。苏联共产党的历史告诉我们:列宁、斯大林的正确思想和托洛茨基、布哈林等人的错误思想的矛盾,在开始的时候还没有表现为对抗的形式,但随后就发展为对抗的了。中国共产党的历史也有过这样的情形。我们党内许多同志的正确思想和陈独秀、张国焘等人的错误思想的矛盾,在开始的时候也没有表现为对抗的形式,但随后就发展为对抗的了。目前我们党内的正确思想和错误思想的矛盾,没有表现为对抗的形式,如果犯错误的同志能够改正自己的错误,那就不会发展为对抗性的东西。因此,党一方面必须对于错误思想进行严肃的斗争,另方面又必须充分地给犯错误的同志留有自己觉悟的机会。在这样的情况下,过火的斗争,显然是不适当的。但如果犯错误的人坚持错误,并扩大下去,这种矛盾也就存在着发展为对抗性的东西的可能性

What is to be Done http://books.google.com/books?id=P4dGAQAAIAAJ& (1899) p. 262
Context: The workmen's revolution, with the terrors of destruction and murder, not only threatens us, but we have already been living upon its verge during the last thirty years, and it is only by various cunning devices that we have been postponing the crisis... The hatred and contempt of the oppressed people are increasing, and the physical and moral strength of the richer classes are decreasing: the deceit which supports all this is wearing out, and the rich classes have nothing wherewith to comfort themselves.
The Naked Communist (1958)
The Naked Communist (1958)