Walter Lippmann was an American journalist who lived from 1889 to 1974. He won the Pulitzer Prize twice. His writing focused on politics and the problems associated with informing the public about political matters ("Walter Lippmann", 2016).
References
Walter Lippmann. (2016). In Encyclopædia Britannica. Retrieved from http://www.britannica.com/biography/Walter-Lippmann