Between 1950 and 1954, in the midst of "cold war", a true witch hunt is rampant in the United States, on the initiative of Senator Joseph McCarthy. This campaign against the Communists is so appalling that McCarthyism remains the symbol of intolerance and blind fear . Because McCarthyism is well born of the fear of the Soviet Union and has never had any rational basis.
During four years, entire categories of the population have been denounced and arrested, each considered as a potential State enemy.
How an obscure small Senator of Wisconsin, unknown until then, it could plunge the world power in such obscurantism?

February 19, 1950, at a Conference, Senator j. McCarthy attacks with virulence to communism. His eyes, communism represents a global danger but also a scourge within American institutions.
He says that Communist spies infiltrated in the Administration and key within the Government positions. It encourages therefore all Americans to lead a crusade to unmask these traitors that endanger the life of the Nation. Against all expectations, this crazy speech and without any basis will spread throughout America. McCarthyism was born. It will plunge US into a real fever of denunciations and slanders.
Irish origin and Catholic, McCarthy is a Republican Senator. Renowned as a good living, it is also a player and a great drinker.
But this man that shake America for four years is also a liar who invented from scratch a biography to his advantage. In 1950, when he made his speech which has determined the sequence of events, its mandate comes to expiry. It is not at all certain to be re-elected and therefore implements a purely partisan strategy.
So far, McCarthy was never interested in possible communist infiltration.
It is likely that this campaign is inspired by some of the statements. As early as 1946, President Truman had ordered an investigation into the political sympathies of officials. From 1947, many public servants were also returned to their