In the final act of the play, Hale has been convinced that the accusations of witchcraft are fraudulent, motivated by fear, greed, and lingering interpersonal conflict. Nearby towns have overthrown the court and violence has broken out. The court officials there are endangered.
Hale fears that similar things could happen in Salem. More importantly, for Hale, the deaths of more innocent people can be avoided if the court relents.
Hale's efforts to stop the court and to save the life of John Proctor are too little and too late. Though he has realized that his confidence and pride have helped to facilitate a great and grave injustice, his repentence and change of heart are not enough to change the course of events.
The play ends with Hale weeping.