“The economic basis for a true Socialist Republic does not yet exist… Communism is failing. Russian expectations are not towards communism, but towards capitalism…. The capitalist classes are advancing in serried ranks towards the promised land, destined to become in a few decades one of the greatest productive forces in the world.”
As quoted in The Life of Benito Mussolini, Margherita Sarfatti, London: UK. Thornton Butterworth, Ltd., 1926, p. 261, remarks made at the end of 1920. https://archive.org/stream/in.ernet.dli.2015.173841/2015.173841.The-Life-Of-Benito-Mussolini_djvu.txt
1920s
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Vladimir Lenin 336
Russian politician, led the October Revolution 1870–1924Related quotes

Introduction to Capital. Introduction to volume 1 (1976)

“The evolution toward Communism is inevitable.”
Reported in the National Review (November 1962) as a misattribution created by extreme rightists. See Paul F. Boller, John George, They Never Said It: A Book of Fake Quotes, Misquotes, and Misleading Attributions (1990), p. 33.
Misattributed

"You and the Atom Bomb" http://orwell.ru/library/articles/ABomb/english/e_abomb, Tribune (19 October 1945). Reprinted in George Orwell: The Collected Essays, Journalism & Letters, Volume 4: In Front of Your Nose 1946–1950 (2000) by Sonia Orwell, Ian Angus, p. 9. <!-- http://books.google.com/books?id=zaxG_3ivhVAC&pg=PA9&dq=orwell+%22permanent+state+of+cold+war%22&sig=XIYruzSnIoMeE2TwqGRNoNA4IuE -->
First documented use of the phrase "cold war".
Context: Looking at the world as a whole, the drift for many decades has been not towards anarchy but towards the reimposition of slavery. We may be heading not for general breakdown but for an epoch as horribly stable as the slave empires of antiquity. James Burnham's theory has been much discussed, but few people have yet considered its ideological implications — that is, the kind of world-view, the kind of beliefs, and the social structure that would probably prevail in a state which was at once unconquerable and in a permanent state of "cold war" with its neighbors.
Had the atomic bomb turned out to be something as cheap and easily manufactured as a bicycle or an alarm clock, it might well have plunged us back into barbarism, but it might, on the other hand, have meant the end of national sovereignty and of the highly-centralised police state. If, as seems to be the case, it is a rare and costly object as difficult to produce as a battleship, it is likelier to put an end to large-scale wars at the cost of prolonging indefinitely a "peace that is no peace."

Source: 1910s, Proposed Roads To Freedom (1918), Ch. VI: International relations, p. 99

Lenin as Philosopher (1938), Chapter 8

Reported by Paul Scott in the Lewiston Daily Sun (27 September 1972) again as remarks at Duke University; http://news.google.com/newspapers?id=FXwgAAAAIBAJ&sjid=7mcFAAAAIBAJ&pg=1010,3814989 reported elsewhere as a remark made at Michigan State University (22 November 1970) and cited to the Detroit Free Press but without a date, page or headline.
Rick Perlstein, in a 2005 London Review of Books article and in his 2008 book Nixonland: The Rise of a President and the Fracturing of America (Simon and Schuster, p517 http://books.google.com/books?id=dM_enWzoghoC&pg=PA517#v=onepage&q&f=false), accused Helms of inventing the quote: "They tapped their network of friendly media propagandists, like the future Senator Jesse Helms, then a TV editorialist, who supplied an invented quotation that still circulates as part of the Fonda cult’s liturgy." http://www.lrb.co.uk/v27/n22/rick-perlstein/operation-barbarella The COINTELPRO Papers (2002) documents a separate attempt to plant false quotes from Fonda in the press.
Disputed

The Age of Discontinuity (1969)
1960s - 1980s

The Economy of New Democracy
On New Democracy (1940)

Source: Capitalism and Modern Social Theory (1971), p. 16 (Quote is from Marx, Early Writings (1964), p. 154).