“Libelling against a private man is a moral offence; but when it is against a government, it tends to the destruction of it.”

Letter to Sir Henry Peek http://wist.info/salisbury-lord/5899/ (1888)
1880s

Near v. Minnesota, 283 U.S. 697 (1931).
Judicial opinions

Source: Unbought and Unbossed (1970), p. 108.

The Colbert Report, Comedy Central (November 6, 2008)

Source: The Virtue of Selfishness: A New Concept of Egoism

Replication Against Certain Young Scholars (date unknown, but certainly after 1523, generally considered to be among Skelton's final works), a criticism of heretical thought among the young men then attending universities, reported in Bartlett's Familiar Quotations, 10th ed. (1919).

Federalist No. 10
1780s, Federalist Papers (1787–1788)

Source: The Birth of the Clinic: An Archaeology of Medical Perception

Wordsworth, originally published as "Preface to the Poems of Wordsworth" in Macmillan's Magazine (July 1879)
Essays in Criticism, second series (1888)
Context: If what distinguishes the greatest poets is their powerful and profound application of ideas to life, which surely no good critic will deny, then to prefix to the word ideas here the term moral makes hardly any difference, because human life itself is in so preponderating a degree moral.
It is important, therefore, to hold fast to this: that poetry is at bottom a criticism of life; that the greatness of a poet lies in his powerful and beautiful application of ideas to life — to the question, How to live. Morals are often treated in a narrow and false fashion, they are bound up with systems of thought and belief which have had their day, they are fallen into the hands of pedants and professional dealers, they grow tiresome to some of us. We find attraction, at times, even in a poetry of revolt against them; in a poetry which might take for its motto Omar Khayam's words: "Let us make up in the tavern for the time which we have wasted in the mosque." Or we find attractions in a poetry indifferent to them, in a poetry where the contents may be what they will, but where the form is studied and exquisite. We delude ourselves in either case; and the best cure for our delusion is to let our minds rest upon that great and inexhaustible word life, until we learn to enter into its meaning. A poetry of revolt against moral ideas is a poetry of revolt against life; a poetry of indifference towards moral ideas is a poetry of indifference towards life.