Walter Lippmann was an influential American journalist, political commentator, and author, born on September 23, 1889. He is best known for his work in the early to mid-20th century, where he contributed significantly to the fields of journalism and public opinion. Lippmann's writings often explored the relationship between media, democracy, and public perception, making him a key figure in the study of mass communication. Lippmann's most notable works include "Public Opinion" (1922) and "The Phantom Public" (1925), where he argued that the average citizen often lacks the information necessary to make informed decisions. His ideas have had a lasting impact on political science and media studies, influencing how we understand the role of the press in society.