Belief in witchcraft, and by consequence witch-hunts, is found in many cultures worldwide, today mostly in Sub-Saharan Africa (e.g. in the witch smellers in Bantu culture), and historically notably in Early Modern Europe of the 14th to 18th century, where witchcraft came to be seen as a vast diabolical conspiracy against Christianity, and accusations of witchcraft led to large-scale witch-hunts, especially in Germanic Europe.
The "witch-cult hypothesis", a controversial theory that European witchcraft was a suppressed pagan religion, was popular in the 19th and early 20th centuries. Since the mid-20th century, Witchcraft has become the self-designation of a branch of neopaganism, especially in the Wicca tradition following Gerald Gardner, who claimed a religious tradition of Witchcraft with pre-Christian roots.
Books You Might Enjoy:
Dr Leo Martello - Weird Ways Of Witchcraft
Louise Huebner - Witchcraft For All
Mike Nichols - Eight Sabbats Of Witchcraft
Michael Harrison - The Roots Of Witchcraft
Paul Huson - Mastering Witchcraft