Christianity is the lynchpin of Salem society and one of the reasons why the accusations of witchcraft are so easily spread, believed and feared.
The people of Salem are superstitious and fearful, and it is their fear of the unknown which leads to many accusations.
The idea that the actions of one person can influence the actions of the majority is explored through the ‘crying out‘ scenes.
This is a major theme, with the battle between villagers over land and status as important as that between the law/religious authority and individuals.
People standing up for their beliefs is an integral part of the play: it ends with John Proctor giving his life in order to stay true to himself. Miller suggests that having integrity can be very difficult but it is necessary.