“There is clear truth in the idea that a struggle from the lower classes of society, towards the upper regions and rewards of society, must ever continue. Strong men are born there, who ought to stand elsewhere than there.”
1840s, Heroes and Hero-Worship (1840), The Hero as Man of Letters
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Thomas Carlyle 481
Scottish philosopher, satirical writer, essayist, historian… 1795–1881Related quotes
Oscar Iden Lecture Series, Lecture 3: "The State of Individuals" (1976)

What is Art? (1897)
Context: In the upper, rich, more educated classes of European society doubt arose as to the truth of that understanding of life which was expressed by Church Christianity. When, after the Crusades and the maximum development of papal power and its abuses, people of the rich classes became acquainted with the wisdom of the classics and saw, on the one hand, the reasonable lucidity of the teachings of the ancient sages, and on the other hand, the incompatibility of the Church doctrine with the teaching of Christ, they found it impossible to continue to believe the Church teaching.

Statement during a speech by Mohammad Al Gergawi delivered at The White House on the occasion of hosting the third Global Entrepreneurship Summit in Dubai as quoted in White House | Mohammad Al Gergawi tells the secret behind UAE's success story https://www.youtube.com/watch?v=ahOZgtob-DQ in Wam (November 2012).
2012
Source: https://www.youtube.com/watch?v=ahOZgtob-DQ
Source: https://2009-2017.state.gov/e/eb/cba/entrepreneurship/ges/2012gep/index.htm

David Cay Johnston; How The One Percent Enrich Themselves at Government Expense (Jun 23, 2009)

As quoted in The Military Programme of the Proletarian Revolution, Collected Works, Vol. 23, pages 78-9.
Attributions
Source: Culture's consequences: International differences in work-related values (1980), p. 51.

“The history of all hitherto existing society is the history of class struggles.”
Source: The Manifesto of the Communist Party (1848), Section 1, paragraph 1, lines 1-2.