Source: Introduction to the Study of Public Administration, 1926, p. 5
“The more our commercial system gains in complication, the more does the common prosperity of us all come to depend upon the due performance of all contracts. Commercial development is broadly illustrating one profound truth: that the real basis of social morality is self-interest. If the subject of rivalry between nations is business, the code which has come to dominate business must necessarily come to dominate the conduct of governments.”
The Great Illusion (1910)
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Norman Angell 44
British politician 1872–1967Related quotes

Defence of Criminals: A Criticism of Morality (1889)

Page 112
Other writings, The Nature of the Judicial Process (1921)
As quoted in The Best Liberal Quotes Ever : Why the Left is Right (2004) by William P. Martin. Though widely attributed to Henry, this statement has not been sourced to any document before the 1990s and appears to be at odds with his beliefs as a strong opponent of the adoption of the US Constitution.
Misattributed

1900s, First Annual Message to Congress (1901)

Attributed in Shadow Kings (2005) by Mark Hill, p. 91; This and similar remarks are presented on the internet and elsewhere as an expression of regret for creating the Federal Reserve. The quotation appears to be fabricated from out-of-context remarks Wilson made on separate occasions:
I have ruined my country.
Attributed by Curtis Dall in FDR: My Exploited Father-in-Law, regarding Wilson's break with Edward M. House: "Wilson … evidenced similar remorse as he approached his end. Finally he said, 'I am a most unhappy man. Unwittingly I have ruined my country.'"
A great industrial nation is controlled by its system of credit.…
"Monopoly, Or Opportunity?" (1912), criticizing the credit situation before the Federal Reserve was created, in The New Freedom (1913), p. 185
We have come to be one of the worst ruled… Governments….
"Benevolence, Or Justice?" (1912), also in The New Freedom (1913), p. 201
The quotation has been analyzed in Andrew Leonard (2007-12-21), " The Unhappiness of Woodrow Wilson https://www.salon.com/2007/12/21/woodrow_wilson_federal_reserve/" Salon:
I can tell you categorically that this is not a statement of regret for having created the Federal Reserve. Wilson never had any regrets for having done that. It was an accomplishment in which he took great pride.
John M. Cooper, professor of history and author of several books on Wilson, as quoted by Andrew Leonard
Misattributed

Letter to John Wilson Croker (30 September 1833), quoted in L. J. Jennings (ed.), The Croker Papers: The Correspondence and Diaries of the Late Right Honourable John Wilson Croker, LL.D., F.R.S., Secretary to the Admiralty from 1809 to 1830, Vol. II (1884), p. 218

Source: Memoirs of My Dead Life http://www.gutenberg.org/dirs/etext05/8mmdl10.txt (1906), Ch. 12: Sunday Evening in London

Un Art de Vivre (The Art of Living) (1939), The Art of Friendship