They are certainly effective in Africa, and their victims are not indiscriminate at all. In contrast to early modern Europe, where the victims of witch-hunts were generally (though by no means exclusively) also the victims of the new market forces, most African witches are the beneficiaries of market relations, which destroy traditional kinship structures and give access to an obviously metaphysical, supernatural kind of power. The "big men" who are known as "soul-eaters" throughout the continent are not the destitute old women of European witch-hunts, they are the nouveau riche. And, unlike many of the alleged European witches, these guys really *do* practice witchcraft--as in pacts with demons, human sacrifice, cannibalism, the lot.