I think Abigail Williams is the one to blame for a variety of reasons. First of all she slept with John Proctor knowing that he was married. No one made her sleep with him, she did it voluntarily. Then, she made all the other little girls lie about everything, she came up with the plans. Finally, she ditched town and stole money without even solving any of the problems she caused. A lot of what happened in the story could’ve changed and been different if she hadn’t done any of these things.