Who or what caused the salem witch trials?

The infamous Salem witch trials began during the spring of 1692, after a group of young girls in Salem Village, Massachusetts, claimed to be possessed by the devil and accused several local women of witchcraft. ... By September 1692, the hysteria had begun to abate and public opinion turned against the trials.

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).