If Judge Danforth had not charged Proctor with witchery, then Proctor would have lived. Proctor would have raised his boys. He and his wife would have been happy after getting through a great struggle together. This mess would have been over. Putnam would have tried other ways to get at Proctor because there is an apparent division between the two fundamentally.
Here's another example: If Hale would have convinced Danforth sooner to stop this madness, then none of these proceedings could have happened at least at that time. Parris would have struggled with his congregation. Proctor would have continued to press Putnam, and Putnam would have looked for a new way to get people in trouble. Proctor's marriage would likely still be in trouble.