Answer:
MISOGYNY
Miller's portrayal of women in The Crucible is a much-discussed topic. The attitudes towards women in the 1950s, when the play was written, are evident in the roles they're given. The most substantial female character is Abigail, who is portrayed as a devious and highly sexualized young woman. She is cast as a villain. Then, on the other end of the spectrum, we have Rebecca Nurse. She is a sensible, saintly old woman who chooses to martyr herself rather than lie and confess to witchcraft. The other two main female characters, Elizabeth and Mary Warren, are somewhat bland. Elizabeth is defined by her relationship to John, and Mary is pushed around by other characters (mostly men) throughout the play. The Crucible presents a view of women that essentially reduces them to caricatures of human beings that are defined by their roles as mothers, wives, and servants to men. Abigail, the one character who breaks from this mold slightly, is portrayed extremely unsympathetically despite the fact that the power dynamic between her and John makes him far more culpable in their illicit relationship.
Deception is a major driving force in The Crucible. This includes not only accusatory lies about the involvement of others in witchcraft but also the lies that people consistently tell about their own virtuousness and purity in such a repressive society. The turmoil in Salem is propelled forward by desires for revenge and power that have been simmering beneath the town's placid exterior. There is a culture of keeping up appearances already in place, which makes it natural for people to lie about witnessing their neighbors partaking in Satanic rituals when the opportunity arises (especially if it means insulating themselves from similar accusations and even achieving personal gain). The Crucible provides an example of how convenient lies can build on one another to create a universally accepted truth even in the absence of any real evidence.
Guilt
The theme of guilt is one that is deeply relevant to John Proctor's character development throughout the play. John feels incredibly ashamed of his affair with Abigail, so he tries to bury it and pretend it never happened. His guilt leads to great tension in interactions with Elizabeth because he projects his feelings onto her, accusing her of being judgmental and dwelling on his mistakes. In reality, he is constantly judging himself, and this leads to outbursts of anger against others who remind him of what he did (he already feels guilty enough!). Hale also contends with his guilt in act 4 for his role in condemning the accused witches, who he now believes are innocent.