The characters exist in a time of unforgiving and vengeful Puritanism. As a result, they are narrow minded and gullible. On one hand, they'll do anything at all to appear "good" in God's eyes. But, on the other, they all seem to be in it for themselves. At various times throughout the play almost all of the characters pointed a finger at someone. Sometimes it was justified, but in many cases it was just to move the focus off himself.
For example, Abigail Williams, to the average member of the town, may appear to be a normal, average seventeen year old girl. But, in reality, she is the one who started it all. She worked in the Proctor home and even initiated an affair with John Proctor. She wanted to put a curse on Elizabeth Proctor. What did the others have to gain? Abby was the leader of it all. She planed it all for her own personal gain. She wanted to move Elizabeth out of the scene so that she could marry John. If she hadn't decided to try to put a spell on Elizabeth most of the story wouldn't have existed. Here desire for John caused her to perform actions that led to the trials. Without her actions the town may have stayed undisrupted. She did not realize or care about the effect of her decisions on others.
Thomas Puntnam also had his own personal reasons for his actions. He fought against the people defending themselves. He didn't care whether they were guilty or innocent though. Putnam was a smart man, and he was a wealthy man. He realized that if the others weren't around he would have a