“This mutual dependencies no longer the dialectical relationship between master and servant, which has been broken in the struggle for mutual recognition, but rather a vicious circle which encloses both the master and the servant. Do the technicians rule, or is their rule that of the others, who rely on the technicians as their planners and executors?”

Source: 1900s, Up From Slavery (1901), Chapter XVI: Europe
Context: In one thing, at least, I feel sure that the English are ahead of Americans, and that is, they have learned how to get more out of life. The home life of the English seems to me to be about as perfect as anything can be. Everything moves like clockwork. I was impressed, too, with the deference that the servants show to their "masters" and "mistresses" - terms which I suppose would not be tolerated in America. The English servant expects, as a rule, to be nothing but a servant, and so he perfects himself in the art to a degree that no class of servants in America has yet reached. In our country the servant expects to become, in a few years, a "master" himself. Which system is preferable? I will not venture an answer.

Commencement Address at Columbia University http://www.eisenhower.archives.gov/education/bsa/citizenship_merit_badge/eisenhower_citizenship_quotations.pdf (1 June 1949)
1940s

"The Power of Money in Bourgeois Society"
Source: Economic and Philosophic Manuscripts of 1844, p. 105, The Marx-Engels Reader

Act I, scene II. — (Polinico).
Translation reported in Harbottle's Dictionary of quotations French and Italian (1904), p. 432.
La Calandria (c. 1507)

1910s, The New Nationalism (1910)
Variant: The true friend of property, the true conservative, is he who insists that property shall be the servant and not the master of the commonwealth; who insists that the creature of man’s making shall be the servant and not the master of the man who made it. The citizens of the United States must effectively control the mighty commercial forces which they have called into being.

As quoted by Laura Huxley, in conversation with Alan Watts about her memoir This Timeless Moment (1968), in Pacifica Archives #BB2037 [sometime between 1968-1973])

Source: The Happiness Project: Or Why I Spent a Year Trying to Sing in the Morning, Clean My Closets, Fight Right, Read Aristotle, and Generally Have More Fun

Remarks to the Los Angeles Chamber of Commerce http://www.eisenhower.archives.gov/education/bsa/citizenship_merit_badge/speeches/address_convention_hall.pdf (31 January 1962)
1960s