In the early 1950s, the United States was gripped by a terror unlike any external military threat — the fear of the enemy within. Senator Joseph McCarthy claimed to hold lists of Communists embedded inside the U.S. government, Hollywood, and the nation's universities. For four terrifying years, those accusations alone were enough to destroy careers, silence artists, and paralyze an entire democracy. Red Scare: McCarthyism and the American Witch Hunt for Communists is the definitive account of this dark chapter in American history. Drawing on congressional records, FBI files, personal testimonies, and decades of scholarship, this book traces the full arc of the Red Scare: from the genuine postwar anxiety about Soviet espionage that gave demagogues their opening, through the blacklisting of Hollywood screenwriters and the purging of State Department diplomats, to the dramatic Army-McCarthy hearings where attorney Joseph Welch asked the question that ended a career: 'Have you no sense of decency?' But McCarthyism was never just about one senator. It was sustained by J. Edgar Hoover's FBI, by studio executives who compiled blacklists, by newspaper owners who amplified accusations without demanding evidence. This book examines the entire machinery of the Red Scare and the remarkable individuals who stood against it. A gripping, essential history for anyone who wants to understand how democracies fail — and how, with courage, they fight back.