The most active period of the witchcraft trials coincides with a period of lower than average temperature known to climatologists as the "little ice age"...In a time period when the reasons for changes in weather were largely a mystery, people would have searched for a scapegoat in the face of deadly changes in weather patterns. 'Witches' became target for blame because there was an existing cultural framework that both allowed their persecution and suggested that they could control the weather.