Professional wrestling in the United States, until the 1920s, was viewed as a legitimate sport. This view did not endure into the 1930s, as professional wrestling became identified with modern theatrics, or "admitted fakeness" ("kayfabe"), moving away from being a showcase for true competition. The scripted nature of the art has made critics view it as an illegitimate sport, particularly in comparison to boxing, mixed martial arts, amateur wrestling, and the real sport itself, wrestling. No major promoter or wrestler denies that modern professional wrestling has predetermined match outcomes.
Through the advent of television in the 1950s and cable in the 1980s, professional wrestling began appearing in powerful media outlets, reaching never before seen numbers of viewers. It became an international phenomenon with the expansion of the World Wrestling Federation (WWF). Throughout the 1990s, professional wrestling achieved highs in both viewers and financial success during a time of fierce competition among competing promotions, such as WWF, World Championship Wrestling, and Extreme Championship Wrestling.
The nature of professional wrestling changed dramatically to better fit television, enhancing character traits and storylines. Television also helped many wrestlers break into mainstream media, becoming influential celebrities and icons of popular culture. In the United States, in the First Golden Age of professional wrestling in the 1940s–1950s, Gorgeous George gained mainstream popularity, followed in the Second Golden Age in the 1980s–1990s by Ric Flair, Andre the Giant, Hulk Hogan, Shawn Michaels, Bret Hart, Sting, The Undertaker, Stone Cold Steve Austin, The Rock, Kurt Angle, and Triple H.