“I deny and utterly scout the idea, that there is now, properly speaking, any such thing as a negro problem before the American people. It is not the negro, educated or illiterate, intelligent or ignorant, who is on trial, or whose qualities are giving trouble to the nation… The real question, the all-commanding question, is whether American justice, American liberty, American civilization, American law, and American Christianity can be made to include and protect, alike and forever, all American citizens… It is whether this great nation shall conquer its prejudices, rise to the dignity of its professions, and proceed in the sublime course of truth and liberty marked out for itself during the late war, or shall swing back to its ancient moorings of slavery and barbarism. The trouble is that the colored people have still to contend against ’a fierce and formidable foe,’ the ghost of a by-gone, dead and buried institution.”

1960s, The American Promise (1965)

1960s, The American Promise (1965)

Speech to the Third Army (1944)

1970s, Proclamation 4417 (1976)
Variant: I call upon the American people to affirm with me this American Promise -- that we have learned from the tragedy of that long-ago experience forever to treasure liberty and justice for each individual American, and resolve that this kind of action shall never again be repeated.

1910s, Letter to the American Defense Society (1919)
Context: In the first place we should insist that if the immigrant who comes here in good faith becomes an American and assimilates himself to us, he shall be treated on an exact equality with everyone else, for it is an outrage to discriminate against any such man because of creed, or birthplace, or origin. But this is predicated upon the man's becoming in very fact an American, and nothing but an American. If he tries to keep segregated with men of his own origin and separated from the rest of America, then he isn't doing his part as an American. There can be no divided allegiance here. Any man who says he is an American, but something else also, isn't an American at all. We have room for but one flag, the American flag, and this excludes the red flag, which symbolizes all wars against liberty and civilization, just as much as it excludes any foreign flag of a nation to which we are hostile. We have room for but one language here, and that is the English language, for we intend to see that the crucible turns our people out as Americans, of American nationality, and not as dwellers in a polyglot boarding-house; and we have room for but one soul loyalty, and that is loyalty to the American people.

1920s, Ordered Liberty and World Peace (1924)

Dennis Prager. Still the Best Hope: Why the World Needs American Values to Triumph https://books.google.com/books?id=aAFSQWdwexEC, 2012.
2010s

representing imperialism and capitalism.
2010s, A Dark Time in America (2016)

The Poems of a Jew (1958)