The Crucible by Arthur Miller
The Crucible is set against the backdrop of the mad witch hunts of the Salem witch trials in the late 17th century.
"The Salem tragedy developed from a paradox. It is a paradox in whose grip we still live, and there is no prospect yet that we will discover its resolution. Simply, it was this: for good purposes, even high purposes, the people of Salem developed a theocracy, a combine of state and religious power whose function was to keep the community together, and to prevent any kind of disunity that might open it to destruction by material or ideological enemies. It was forged for a necessary purpose and accomplished that purpose. But all organisation is and must be grounded on the idea of exclusion and prohibition, just as two objects cannot occupy the same space. Evidently the time came in New England when the repressions or order were heavier than seemed warranted by the dangers against which the order was organised. The witch-hunt was a perverse manifestation of the panic which set in among all classes when the balance began to turn toward greater individual freedom."
from Arthur Miller's notes on the play, 1953
Click for background information on the Salem witch hunts: http://www.nationalgeographic.com/salem/