What john o'sullivan wite a influential editorial about?

Answer 1

Manifest destiny

Answer 2

John O'Sullivan wrote an influential editorial in 1845 about the concept of "Manifest Destiny" and the United States' expansion westward. This term came to symbolize the belief that it was the country's destiny to expand and bring civilization across the continent. O'Sullivan argued that it was the nation's duty to spread democracy and American ideals throughout the continent.