Was one of the major ancient religions. Though its organised form is mostly extinct today, a revival has been attempted under the name of Neo-Manichaeism. However, most of the writings of the founding prophet Mani have been lost. Some scholars and anti-Catholic polemicists argue that its influence subtly continues in Western Christian thought via Saint Augustine of Hippo, who converted to Christianity from Manichaeism and whose writing continues to be enormously influential among Catholic and Protestant theologians.