Despite some belief in spirits, there was no real worship of them. Religion was primarily concerned with ancestor worship. Divination was the means of discovering the wishes of the ancestors, and sacrifice of cattle was the means of propitiation. Sorcery and witchcraft were quite common. Missionaries have been in Zululand since 1835, and apparently have been quite successful: more than half the population is reckoned as Christian. According to Ngubane (1977) and others, Christianity does not conflict with ancestor worship or belief in witchcraft.