Who was john o sillivan?

Answer 1

John L. O'Sullivan was a 19th-century American journalist and editor, best known for coining the term "Manifest Destiny" in 1845. This phrase encapsulated the belief that the United States was destined to expand across the North American continent. O'Sullivan's writings promoted the idea of westward expansion as a moral and political obligation, reflecting the era's sentiments about American exceptionalism. His work influenced public opinion and policy regarding territorial expansion during the period.