Walter Lippmann was arguably the most influential American journalist of the 20th century.
Lippmann was one of the most successful people who ever lived…. No other journalist in American history has had so much influence on events, had his hand in so many state papers, been on such equal terms with the great.
Alfred Kazin noted this in The New Republic, a magazine Lippmann helped create, highlighting Lippmann's significant impact on events and his ability to impart political intelligence with a magisterial air.
Author's summary: Lippmann's journalism had significant influence.