
1860s, Fourth of July Address to Congress (1861)
On the Irrepressible Conflict (1858)
Context: The Union is a confederation of States. But in another aspect the United States constitute only one nation. Increase of population, which is filling the States out to their very borders, together with a new and extended network of railroads and other avenues, and an internal commerce which daily becomes more intimate, is rapidly bringing the States into a higher and more perfect social unity or consolidation. Thus, these antagonistic systems are continually coming into closer contact, and collision results.
Shall I tell you what this collision means? They who think that it is accidental, unnecessary, the work of interested or fanatical agitators, and therefore ephemeral, mistake the case altogether. It is an irrepressible conflict between opposing and enduring forces, and it means that the United States must and will, sooner or later, become either entirely a slaveholding nation, or entirely a free-labor nation.
1860s, Fourth of July Address to Congress (1861)
2015, Why do people believe myths about the Confederacy? Because our textbooks and monuments are wrong (2015)
James M. McPherson. "No Peace without Victory, 1861–1865" https://web.archive.org/web/20050404133343/http://www.historians.org/info/AHA_History/JMMcPherson.htm (2003), American Historical Association
2000s
Proclamation against the Nullification Ordinance of South Carolina (11 December 1832)
1830s
Context: To say that any State may at pleasure secede from the Union, is to say that the United States are not a nation because it would be a solecism to contend that any part of a nation might dissolve its connection with the other parts, to their injury or ruin, without committing any offense. Secession, like any other revolutionary act, may be morally justified by the extremity of oppression; but to call it a constitutional right, is confounding the meaning of terms, and can only be done through gross error, or to deceive those who are willing to assert a right, but would pause before they made a revolution, or incur the penalties consequent upon a failure.
Source: Prison Writings: Roots of Civilisation, excerpt " Democratic Confederalism http://www.freedom-for-ocalan.com/english/".
Message regarding the unification of Germany http://millercenter.org/president/grant/speeches/message-regarding-unification-of-germany (7 February 1871)
1870s
North & South Magazine http://thecivilwarhomepagediscussion2824.yuku.com/forum/getrefs/id/16744/type/0 (January 2008), Vol. 10, No. 4, p. 59
2000s
and with Britain in 1948 and 1956
Progress, Coexistence and Intellectual Freedom (1968), Dangers, Vietnam and the Middle East