MANIFEST DESTINY/ CONSERVATIVE INTERPREATATION
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- Introduction & Top Questions
- Origin of the term
- A history of expansion
- The end of Manifest Destiny
- The New Manifest Destiny
- Conflicting interpretations
References & Edit HistoryQuick Facts & Related Topics
At a Glance
Causes and Effects of Manifest Destiny
Related Questions
- What was Manifest Destiny?
- When was the term Manifest Destiny coined?
- How did Manifest Destiny lead to the growth of the West?
- What is McCarthyism?
- What led to McCarthyism?
Quick FactsDate: August 1845 – c. 1853On the Web: Minnesota State – American History Told By Contemporaries – Manifest Destiny (July 23, 2026)
Manifest Destiny
United States history
Jeanne T. HeidlerAll
Britannica Editors
July 23, 2026 •History
Britannica AIAsk AnythingQuick Summary
Top Questions
What was Manifest Destiny?
When was the term Manifest Destiny coined?
How did Manifest Destiny lead to the growth of the West?
Manifest Destiny, in U.S. history, the supposed inevitability of the continued territorial expansion of the boundaries of the United States westward to the Pacific and beyond. Before the American Civil War (1861–65), the idea of Manifest Destiny was used to validate continental acquisitions in the Oregon Country, Texas, New Mexico, and California. The purchase of Alaska after the Civil War briefly revived the concept of Manifest Destiny, but it most evidently became a renewed force in U.S. foreign policy in the 1890s, when the country went to war with Spain, annexed Hawaii, and laid plans for an isthmian canal across Central America.
Origin of the term
John L. O’Sullivan, the editor of a magazine that served as an organ for the Democratic Party and of a partisan newspaper, first wrote of “manifest destiny” in 1845, but at the time he did not think the words profound. Rather than being “coined,” the phrase was buried halfway through the third paragraph of a long essay in the July–August issue of The United States Magazine, and Democratic Review on the necessity of annexing Texas and the inevitability of American expansion. O’Sullivan was protesting European meddling in American affairs, especially by France and England, which he said were acting
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.
O’Sullivan’s observation was a complaint rather than a call for aggression, and he referred to demography rather than pugnacity as the solution to the perceived problem of European interference. Yet when he expanded his idea on December 27, 1845, in a newspaper column in the New York Morning News, the wider audience seized upon his reference to divine superintendence. Discussing the dispute with Great Britain over the Oregon Country, O’Sullivan again cited the claim to
the right of our manifest destiny to overspread and to possess the whole of the continent which Providence has given us for the development of the great experiment of liberty and federated self-government entrusted to us.
Some found the opinion intriguing, but others were simply irritated. The Whig Party sought to discredit Manifest Destiny as belligerent as well as pompous, beginning with Massachusetts Rep. Robert Winthrop’s using the term to mock Pres. James K. Polk’s policy toward Oregon.
Yet unabashed Democrats took up Manifest Destiny as a slogan. The phrase frequently appeared in debates relating to Oregon, sometimes as soaring rhetoric and other times as sarcastic derision. As an example of the latter, on February 6, 1846, the New-Hampshire Statesman and State Journal, a Whig newspaper, described “some windy orator in the House [of Representatives]” as “pouring for his ‘manifest destiny’ harangue.”
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Over the years, O’Sullivan’s role in creating the phrase was forgotten, and he died in obscurity some 50 years after having first used the term “manifest destiny.” In an essay in The American Historical Review in 1927, historian Julius W. Pratt identified O’Sullivan as the phrase’s originator, a conclusion that became universally accepted.
A history of expansion
Despite disagreements about Manifest Destiny’s validity at the time, O’Sullivan had stumbled on a broadly held national sentiment. Although it became a rallying cry as well as a rationale for the foreign policy that reached its culmination in 1845–46, the attitude behind Manifest Destiny had long been a part of the American experience. The impatient English who colonized North America in the 1600s and 1700s immediately gazed westward and instantly considered ways to venture into the wilderness and tame it. The cause of that ceaseless wanderlust varied from region to region, but the behaviour became a tradition within one generation. The western horizon would always beckon, and Americans would always follow. After the American Revolution (1775–83), the steady advance of the cotton kingdom in the South matched the lure of the Ohio Country in the North. In 1803, Pres. Thomas Jefferson’s Louisiana Purchase doubled the size of the country with the stroke of a pen. Expansionists eager to acquire Spanish Florida were part of the drive for the War of 1812, and many historians argue that American desires to annex Canada were also an important part of the equation. Andrew Jackson’s invasion of Florida in 1818 and the subsequent Transcontinental Treaty (Adams-Onís Treaty) settled a southern border question that had been vexing the region for a generation and established an American claim to the Pacific Northwest as Spain renounced its claim to the Oregon Country. The most consequential territorial expansion in the country’s history occurred during the 1820s. Spreading American settlements often caused additional unrest on the country’s western borders. As the United States pacified and stabilized volatile regions, the resulting appropriation of territory usually worsened relations with neighbours, setting off a cycle of instability that encouraged additional annexations.
Caught in the upheaval coincidental to that expansion, Southeast Indians succumbed to the pressure of spreading settlement by ceding their lands to the United States and then relocating west of the Mississippi River under Pres. Andrew Jackson’s removal policy of the 1830s. The considerable hardships suffered by the Indians in that episode were exemplified by the devastation of the Cherokees on the infamous Trail of Tears, which excited humanitarian protests from both the political class and the citizenry.
Finally, in the 1840s, diplomacy resolved the dispute over the Oregon Country with Britain, and victory in the Mexican-American War (1846–48) closed out a period of dramatically swift growth for the United States. Less than a century after breaking from the British Empire, the United States had gone far in creating its own empire by extending sovereignty across the continent to the Pacific, to the 49th parallel on the Canadian border, and to the Rio Grande in the south. Having transformed a group of sparsely settled colonies into a continental power of enormous potential, many Americans thought the achievement so stunning as to be obvious. It was for them proof that God had chosen the United States to grow and flourish.
Yet in a story as old as ancient Rome’s transformation from republic to empire, not all Americans, like the doubters of Rome, found it encouraging. Those dissenters saw rapid expansion as contrary to the principles of a true republic and predicted that the cost of empire would be high and its consequences perilous.
The end of Manifest Destiny
Realizing its Manifest Destiny with triumph over Mexico in 1848 gave the United States an immense domain that came with spectacular abundance and potential. (Under the Treaty of Guadalupe Hidalgo, which ended the war, the United States acquired more than 525,000 square miles [1,360,000 square km] of land, including present-day Arizona, California, western Colorado, Nevada, New Mexico, Texas, and Utah.) California’s climate made much of it a natural garden, and its gold would finance decades of impressive growth. Burgeoning Pacific trade required opening diplomatic relations with heretofore isolationist Japan and created American trade in places that before had always been European commercial preserves. Yet the dispute over the status of the new western territories regarding slavery disrupted the American political system by reviving arguments that shattered fragile compromises and inflamed sectional discord.
In fact, those disputes brought the era of Manifest Destiny to an abrupt close. Plans to tie the eastern United States to the Pacific Coast with a transcontinental railroad led to the country’s final land acquisition before the Civil War when U.S. Minister to Mexico James Gadsden purchased a small parcel of land in 1853 to facilitate a southern route. For that reason alone, the Gadsden Purchase provoked the North, and Americans soon found themselves embroiled in additional arguments that foiled the railroad while killing any possible consensus for further expansion.
The New Manifest Destiny
After the Civil War, reconstructing the Union and promoting the industrial surge that made the United States a premier economic power preoccupied the country. In the 1890s, however, the United States and other great powers embraced geopolitical doctrines stemming from the writings of naval officer and historian Alfred Thayer Mahan, who posited that national greatness in a competitive world derived from the ability to control navigation of the seas. The coincidence of Mahanian doctrine emerging in tandem with Herbert Spencer’s belief that unfettered competition promoted progress led to a naval arms race that revolutionized seagoing architecture and hastened the replacement of sail with steam. Although they accommodated bigger guns and could meet schedules regardless of weather, fuel-hungry steamships required far-flung coaling stations, which encouraged naval powers to plant their flags on remote outposts and define their interest in places never before connected to their security or commerce.
Americans dubbed this freshly found national endeavour the “New Manifest Destiny.” As before, it was a way of clothing imperial ambitions in a higher purpose ostensibly decreed by Providence. The Spanish-American War of 1898 arose from popular outrage over Madrid’s reportedly barbarous colonial policies in Cuba and, more immediately, in response to the destruction of the U.S. battleship Maine, but it ended with the United States acquiring remnants of Spain’s dwindling global empire. Similarly, the annexation of Hawaii in 1898 provided the United States Navy with the desirable port facilities at Pearl Harbor.
The New Manifest Destiny curiously reversed the political lines of support of its forbearer. In the 1840s Manifest Destiny was primarily a Democrat Party doctrine over Whig dissent, but the New Manifest Destiny was a Republican program, especially under Pres. Theodore Roosevelt’s vigorous promotion of it, and Democrats tended to object to it. The Progressive wings of both parties, however, gravitated to advancing American idealism, which led to intervention in World War I and Pres. Woodrow Wilson’s Fourteen Points as a statement of high globalism. Wilson’s program ultimately failed to sustain a consensus among the American people. Just as expansionism before the Civil War collapsed under the press of the slavery controversy, Wilsonian internationalism retreated before the United States’ traditional isolationism after the war.
Conflicting interpretations
Manifest Destiny has caused controversy among historians trying to sort out its origins and assess its significance. In 1893 historian Frederick Jackson Turner put forth what proved a durable interpretation in his seminal essay “The Significance of the Frontier in American History.” In Turner’s view, taming the western wilderness shaped the pioneers as much as they shaped the land they settled, making them robust and capable in continuing the American tradition of pacifying and inhabiting whatever lay beyond the western horizon. In that regard, Turner provided an explanation for American exceptionalism, but, beginning in the mid-1980s, scholars styling themselves New Western Historians challenged his ideas. They rejected the view that Americans were agents of change, let alone purveyors of progress. Rather, the New Western Historians stressed the role of the coalition of government and influential corporations in overwhelming indigenous populations. In addition, they did not see the West fundamentally shaping American exceptionalism, the existence of which they doubted in any case. They focused instead on how competing cultures melded to create a singular heritage that was nevertheless broad and varied.
Whatever the validity of those conflicting views, in the simplest interpretation Manifest Destiny expressed the American version of an age-old yearning for improvement, change, and growth. Those who promoted it might have done so from venal or virtuous motives, and those who opposed it were seemingly vindicated by the Civil War in their grim warnings about the steep costs of a spreading imperium, but the events of American expansionism were a tale more than twice-told in the course of history.
David S. Heidler Jeanne T. HeidlerSociety & Social IssuesHuman Migration
westward movement
United States history
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- What was the westward movement in United States history?
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westward movement, the populating by Europeans of the land within the continental boundaries of the mainland United States, a process that began shortly after the first colonial settlements were established along the Atlantic coast. The first British settlers in the New World stayed close to the Atlantic, their lifeline to needed supplies from England. By the 1630s, however, Massachusetts Bay colonists were pushing into the Connecticut River valley. Resistance from the French and Native Americans slowed their movement westward, yet by the 1750s northern American colonists had occupied most of New England.
In the South, settlers who arrived too late to get good tidewater land moved westward into the Piedmont. By 1700 the Virginia frontier had been pushed as far west as the fall line—the point upstream at which the rivers emptying into the Atlantic became unnavigable. Some pioneers climbed beyond the fall line into the Blue Ridge Mountains, but the major flow into the backcountry regions of Virginia and the other southern Atlantic colonies went southward rather than westward.
Germans and Scots-Irish from Pennsylvania moved down the Shenandoah Valley, largely between 1730 and 1750, to populate the western portions of Virginia and the Carolinas. By the time of the French and Indian Wars, the American frontier had reached the Appalachian Mountains.
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More From BritannicaUnited States: Westward expansion
The British Proclamation of 1763 ordered a halt to the westward movement at the Appalachians, but the decree was widely disregarded. Settlers scurried into Ohio, Tennessee, and Kentucky. After the American Revolution, a flood of people crossed the mountains into the fertile lands between the Appalachians and the Mississippi River. By 1810 Ohio, Tennessee, and Kentucky had been transformed from wilderness into a region of farms and towns.
Despite those decades of continuous westward pushing of the frontier line, it was not until the conclusion of the War of 1812 that the westward movement became a significant outpouring of people across the continent. By 1830 the Old Northwest and Old Southwest—areas scarcely populated before the war—were settled with enough people to warrant the admission of Illinois, Indiana, Missouri, Alabama, and Mississippi as states into the Union.
During the 1830s and ’40s the flood of pioneers poured unceasingly westward. Michigan, Arkansas, Wisconsin, and Iowa received most of them. A number of families even went as far as the Pacific coast, taking the Oregon Trail to areas in the Pacific Northwest. In 1849 fortune seekers rushed into California in search of gold. Meanwhile, the Mormons ended their long pilgrimage in Utah.
Between the Gold Rush and the Civil War, Americans in growing numbers filled the Mississippi River valley, Texas, the southwest territories, and the new states of Kansas and Nebraska. During the war, gold and silver discoveries drew prospectors—and later settlers—into Oregon, Colorado, Nevada, Idaho, and Montana.
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By 1870 only portions of the Great Plains could truly be called unsettled. For most of the next two decades, that land functioned as the fabled open range, home to cowboys and their grazing cattle from ranches in Texas. But by the late 1880s, with the decline of the range cattle industry, settlers moved in and fenced the Great Plains into family farms. That settlement—and the wild rush of pioneers into the Oklahoma Indian Territory—constituted the last chapter of the westward movement. By the early 1890s a frontier had ceased to exist within the 48 continental states.
The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Alicja Zelazko.
