Witchcraft, in historical, anthropological, religious, and mythological contexts, is the use of alleged supernatural or magical powers or spells. A witch (from Old English wicca masculine, wicce feminine) is a practitioner of witchcraft. Historically, it was widely believed in early modern Christian Europe that witches were in league with the Devil and used their powers to harm people and property. Particularly, since the mid-20th century, "bad" and "good" witchcraft are sometimes distinguished, the latter often involving healing. The concept of witchcraft as harmful is normally treated as a cultural ideology, a means of explaining human misfortune by blaming it either on a supernatural entity or a known person in the community.