Overview: Intolerance in America that targets alleged internal subversives controlled by external agents has a storied history that stretches hundreds of years. While the post-World War II "Red Scare" and the emergence of McCarthyism during the 1950s is the era commonly associated with American anticommunism, there was also a "First Red Scare" that occurred in 1919-1920. In both time periods, many Americans feared the radicalism of the left, and some of the most outspoken-like McCarthy-used slander to denounce their political enemies. The result was an atmosphere in which individual rights and liberties were at risk and hysteria prevailed. McCarthyism and the Red Scare: A Reference Guide tracks the rise and fall of Senator Joe McCarthy and the broad pursuit of domestic "Red" subversives in the post-World War II years, and focuses on how American society responded to real and perceived threats from the left during the first decade of the Cold War.