"For most of the last 2000 years all Christian churches have been against artificial birth control. In the first centuries of Christianity, contraception (and abortion) were regarded as wrong because they were associated with paganism or with heretics such as the Gnostics, the Manichees and, in the middle ages, the Cathars. Protestant attitudes to birth control began to change in the 19th century as theologians became more willing to accept that morality should come from the conscience of each individual rather than from outside teachings."