John L. O’Sullivan—“Manifest Destiny”: John L. O’Sullivan, a newspaper editor in New York City, was the premier supporter and spokesman for westward expansion. O’Sullivan backed Democratic President James Polk’s desire to annex Texas, Oregon, and California. In his support he wrote many articles and coined the term “Manifest Destiny” to describe America’s inevitable future occupying the North American continent from the Atlantic to the Pacific.
John O'Sullivan, "Annexation," United States Magazine and Democratic Review 17, no.1 (July-August 1845): 5-10
Texas is now ours. Already, before these words are written, her Convention has undoubtedly ratified the acceptance, by her Congress, of our proffered invitation into the Union; and made the requisite changes in her already republican form of constitution to adapt it to its future federal relations. Her star and her stripe may already be said to have taken their place in the glorious blazon of our common nationality; and the sweep of our eagle's wing already includes within its circuit the wide extent of her fair and fertile land. She is no longer to us a mere geographical space--a certain combination of coast, plain, mountain, valley, forest and stream. She is no longer to us a mere country on the map. She comes within the dear and sacred designation of Our Country; no longer a "pays," she is a part of "la patrie;" and that which is at once a sentiment and a virtue, Patriotism, already begins to thrill for her too within the national heart….
Why, were other reasoning wanting, in favor of now elevating this question of the reception of Texas into the Union, out of the lower region of our past party dissensions, up to its proper level of a high and broad nationality, it surely is to be found, found abundantly, in the manner in which other nations have undertaken to intrude themselves into it, between us and the proper parties to the case, in a spirit of hostile interference against us, for the avowed object of thwarting our policy and hampering our power, limiting our greatness and checking the fulfillment of our manifest destiny to overspread the continent allotted by Providence for the free development of our yearly multiplying millions….
It is wholly untrue, and unjust to ourselves, the pretence that the Annexation has been a measure of spoliation, unrightful and unrighteous--of military conquest under forms of peace and law--of territorial aggrandizement at the expense of justice, and justice due by a double sanctity to the weak. This view of the question is wholly unfounded, and has been before so amply refuted in these pages, as well as in a thousand other modes, that we shall not again dwell upon it. The independence of Texas was complete and absolute. It was an independence, not only in fact, but of right. No obligation of duty towards Mexico tended in the least degree to restrain our right to effect the desired recovery of the fair province once our own--whatever motives of policy might have prompted a more deferential consideration of her feelings and her pride, as involved in the question. If Texas became peopled with an American population; it was by no contrivance of our government, but on the express invitation of that of Mexico herself; accompanied with such guaranties of State independence, and the maintenance of a federal system analogous to our own, as constituted a compact fully justifying the strongest measures of redress on the part of those afterwards deceived in this guaranty, and sought to be enslaved under the yoke imposed by its violation. She was released, rightfully and absolutely released, from all Mexican allegiance, or duty of cohesion to the Mexican political body, by the acts and fault of Mexico herself, and Mexico alone. There never was a clearer case. It was not revolution; it was resistance to revolution: and resistance under such circumstances as left independence the necessary resulting state, caused by the abandonment…