Which character emphasized the need for indisputable proof before condemning anyone to death?

Reverend Hale is the character who emphasizes the necessity of clear and indisputable proof before condemning anyone to death. Initially, Hale comes to Salem with a strong belief in the righteousness of the witch trials but undergoes a significant transformation throughout the play. As he witnesses the consequences of the court's actions, he becomes increasingly aware of the flaws in the judicial process and the danger of relying on spectral evidence or emotional accusations.

Hale's insistence on needing concrete proof stems from his understanding of the moral implications of condemning innocent lives. His drive for evidence reflects a deeper conflict between personal conviction and the societal pressures of the witch hunt. This perspective contrasts sharply with characters who exhibit less concern for the validity of the accusations, showcasing Hale's moral growth and the tragic consequences of the hysteria in Salem. His eventual plea for reason over blind adherence to authority highlights the theme of justice and the importance of truth in human judgment.