write:At its core manifestdestiny called for the territorial expansion of the United States andwas a justification used by southerners for extending slavery. Thus manifest destiny inst

the belief that Americans had a God-givenright
based on racial superiority
to expand to the Pacific Ocean.While the concept dated back to the Puritans
John L. O’Sullivancoined the phrase in 1845
first using it in his newspaper
the UnitedStates Democratic Review (Document 1). Soon manifest destinybecame a staple of American political rhetoric. At its core
manifestdestiny called for the territorial expansion of the United States andwas a justification used by southerners for extending slavery. Thus
manifest destiny instilled nation building through territorialexpansion
promoted the notion of American racial superiority
castall nonwhites—Indians
Mexicans
and blacks—as inferior beings
and ultimately endorsed slavery’s growth. (See the map on page xvi.)