Expansion of influence and territory off the continent became an important corollary to westward expansion. One of the main goals of the U.S. government was the prevention of outside involvement of European countries in the affairs of the western hemisphere. American policymakers sought an outlet for the domestic assertions of manifest destiny in the nation’s early foreign policy decisions of the antebellum period.

As Secretary of State for President James Monroe, John Quincy Adams held the responsibility for the satisfactory resolution of ongoing border disputes in different areas of North America between the United States, England, Spain, and Russia. Adams was a proponent of both the concept of continentalism and an American influence in hemispheric events. Adams’ comprehensive view of American policy aims was put into clearest practice in the Monroe Doctrine, which he had great influence in crafting.

Increasingly aggressive incursions from the Russians in the Northwest, ongoing border disputes with the British in Canada, the remote possibility of Spanish reconquest of South America, and British abolitionism in their Caribbean colonies all forced a U.S. response to the threats encircling the country. However, despite the philosophical confidence present in the Monroe administration’s decree, the reality of limited military power kept the Monroe Doctrine as an aspirational assertion that many in the administration and the country believed the United States would grow into as it matured. Secretary of State Adams acknowledged the American need for a robust foreign policy that simultaneously protected and encouraged the growing and increasingly dynamic capitalist orientation of the country in a speech before the U.S. House of Representatives on July 4^th, 1821.

America…in the lapse of nearly half a century, without a single exception, respected the independence of other nations while asserting and maintaining her own…She is the well-wisher to the freedom and independence of all. She is the champion and vindicator only of her own. She will commend the general cause by the countenance of her voice, and the benignant sympathy of her example. She well knows that by once enlisting under other banners than her own, were they even the banners of foreign independence, she would involve herself beyond the power of extrication, in all the wars of interest and intrigue, of individual avarice, envy, and ambition, which assume the colors and usurp the standard of freedom. The fundamental maxims of her policy would insensibly change from liberty to force. The frontlet on her brows would no longer beam with the ineffable splendor of freedom and independence; but in its stead would soon be substituted an imperial diadem, flashing in false and tarnished lustre the murky radiance of dominion and power. She might become the dictatress of the world; she would be no longer the ruler of her own spirit. . . . Her glory is not dominion, but liberty. Her march is the march of the mind. She has a spear and a shield: but the motto upon her shield is, Freedom, Independence, Peace. This has been her Declaration: this has been, as far as her necessary intercourse with the rest of mankind would permit, her practice.

—John Quincy Adams

However, Adams’ great fear was not territorial loss. He had no doubt that Russian and British interests in North America could be arrested. Adams held no reason to antagonize the Russians with grand pronouncements nor was he generally called upon to do so. He enjoyed a good relationship with the Russian Ambassador and stewarded through Congress most-favored trade status for the Russians in 1824. Rather, Adams worried gravely about the ability of the United States to compete commercially with the British in Latin America and the Caribbean. This concern deepened with the valid concern that America’s chief Latin American trading partner, Cuba, dangled perilously close to outstretched British claws. The Cabinet debates surrounding establishment of the Monroe Doctrine, the international diplomacy undertaken by Adams and his underlings, and geopolitical events in the Caribbean focused attention on that part of the world as key to the future defense of U.S. military and commercial interests with the main threat to those interests being the British. Expansion of economic opportunity and protection of American society and markets from foreign pressures became the overriding goals of U.S. foreign policy.

Bitter disagreements over the expansion of slavery into what became the Mexican Cession territory began even before the Mexican war ended. Many Northern business and Southern slaveowners supported the idea of expansion of American power and slavery into the Caribbean as a useful alternative to continental expansion since slavery already existed in these areas. While some were critical of these attempts, seeing them as evidence of a growing slave-power conspiracy, many supported these extra-legal attempts at expansion. Filibustering, as it was called, was privately financed schemes of varying degrees of operational reality directed at capturing and occupying foreign territory without the approval of the U.S. government.

Filibustering adventures took greatest hold in the imagination of Americans as they looked toward Cuba with particular interest. Fears of racialized revolution in Cuba (as in Haiti before it) as well as the presence of an aggressive British abolitionary influence in the Caribbean energized the movement to annex Cuba and encouraged filibustering activities as expedient alternatives to lethargic official negotiations. Despite filibustering’s seemingly chaotic planning and destabilizing repercussions, those intellectually and economically guiding the effort saw in their efforts a willing and receptive Cuban population and an agreeable American business class. In Cuba, manifest destiny for the first time sought territory off the continent and hoped to put a unique spin on the story of success in Mexico. Yet, the annexation of Cuba, despite great popularity and some military attempts led by Narciso Lopez (pictured), a Cuban dissident, never succeeded.

Regardless of that disappointment planning and action against other areas took place. Most notable among these efforts was William Walker’s momentarily successful filibustering against Nicaragua. Walker, who was a long-time filibusterer, launched several expeditions in Mexico and Central America and achieved success in establishing his rule and slavery on the Nicaraguan coast before eventually being executed, with British encouragement, in Honduras. Although these mission enjoyed neither the support of the law or the U.S. government, wealthy Americans financed various filibusters and less-wealthy adventurers were all to happy to sign up.  Filibustering enjoyed its brief popularity into the late 1850s, at which point slavery and concerns over session came to the fore. By the opening of the Civil War most saw these attempts as simply territorial theft and muscular articulations of individual desires toward profit and dominance. Caribbean expansion, now predicated on the reinvigoration of slavery through filibustering, seemed anathema to the American democratic disposition.

One of the last pieces of manifest destiny’s collapse was the economic fracturing of the regions of the United States. The national economic market steadily weakened as a unifying entity after 1857 when the South finally received some tangible demonstration of the superiority of their economic project. They emerged from the Panic of 1857 with the sense that the North needed Southern commerce more than the South needed Northern industry. The South embraced this evidence and the resultant increase in its confidence as they suffered under the presumption that Northern dominance might never relent. The confidence gained through lucrative business relations with world markets, the diversification of the Southern manufacturing base, the relatively light toll taken by the Panic of 1857, the possibility of Cuban annexation, the dominance of presidential elections in the 1850s, and the political capitulation of Northern interests in the tariff debate of 1858 all led the South toward a belief in the political possibility of secession and the likelihood of success

Throughout the antebellum period slavery continuously expanded onto new ground, embracing new crops, and new machinery. The planter class throughout the United States, the Caribbean, and South America exerted a political and economic dominance in rising world markets and their national political cultures that made the continued existence of slavery the foundation of their power. Yet, profits gained in the sugar, coffee, and cotton areas also depended on a complex economic and industrial partnership between non-slave owning business/production entities and slaveholding agriculturalists. The entire undertaking of the Atlantic economy fueled American growth and drove the confidence and economic funding required for the completion of  manifest destiny’s expansion. Workers and financiers, slaves and settlers, planters and industrialists all produced, willingly or forced, the economic juggernaut that, while encouraging American expansion, also became a part of its undoing.