At each succession, a small number of claimants have disputed the appointed line, and this record states them with the caution the subject requires. After 1892, Bahá'u'lláh's son Mírzá Muhammad 'Alí contested 'Abdu'l-Bahá's headship; after 1957, Charles Mason Remey claimed the Guardianship, and a small Orthodox Bahá'í Faith later formed around his successors. The worldwide Bahá'í community characterizes these claimants as Covenant-breakers and holds no fellowship with them; the claimants' own followers dispute that characterization and maintain their separate accounts. The numbers involved have always been very small beside the worldwide community. The record names the claims, the community's response, and the scholarly literature, and settles none of it.