Widespread Arianism among many of the barbarian tribes that were to constitute the future states of Europe thus became a headache of a different kind for the Church: it produced a resistance to true conversion among the barbarians and an antipathy to the Roman civilization that the Catholic Church brought with it, and it would lead to wars and other turmoil during the Dark Ages. Nearly all the tribes of Europe adopted Arianism, which became among them a sort of warrior religion with outdoor forest