Evil does not happen on its own, it must be fueled. It must connect with a spirit that is desirous of producing evil. If a spirit desires evil, it can have evil, and if a spirit desires good, it can have good. Desire produces the manifestation.
Desire can be a fervent wish, or a mere thought combined with the power of righteousness. When the earth has been reprogrammed for evil, evil becomes wedded to the status quo, and requires monumental effort to overcome. With the power of the Holy Spirit Of God, nothing is impossible.
The Lord God Jesus Of Nazareth