John O'Sullivan
Definition
John O'Sullivan was an influential American journalist and politician in the early 19th century who coined the term 'Manifest Destiny' to describe the belief that American expansion across the continent was inevitable and divinely ordained.
Related terms
Manifest Destiny: This is the term O'Sullivan coined which refers to the 19th-century doctrine or belief that the expansion of the US throughout the American continents was both justified and inevitable.
Annexation of Texas: This event, supported by O'Sullivan, involved incorporating Texas into United States territory in 1845.
Mexican-American War: A conflict between Mexico and America from 1846-1848 over disputes including territorial boundaries; it was heavily influenced by Manifest Destiny beliefs.
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Study guides (1)
AP US History - 5.1 Contextualizing Period 5
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Cram Mode
AP Score Calculators
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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.