To what does Gabbert attribute the start of the Salem Witch Trials in the essay collection, Unreality of Memory?

Gabbert argues that Elizabeth's and Abigail, the two little girls responsible for starting the Salem witch trials, accusations began out of boredom.... that the girls were responding to the strictures of their circumstances and environment, by acting out against it. After detailing their story, Gabbert parallels it to other similar forms of mutiny via false accusation.