Joseph McCarthy controlled the trials and was responsible for it all, getting what he wanted.
McCarthyism produced a series of investigations and hearings to try and expose suspected communists.
Giving someone the wrong power can lead to corruption.
Abigail took over the trials by getting people to really believe her and always got whatever she wanted. "Abigail, backing further, eyes still fixed above Mary, please don't hurt me!" Pg. 115
The Crucible had a series of investigations and tried to get people who were called or suspected a witch to confess. Mr.Danforth - "Have you compacted with the Devil? Have you?" Mary Warren - "Never, never!" Pg. 116
Giving someone too much power can lead to corruption.