 Schisms have occurred over the succession of authority, but any Baháʼí divisions have had relatively little success and have failed to attract a sizeable following.The followers of such divisions are regarded as Covenant-breakers and shunned, essentially excommunicated.The "canonical texts" are the writings of the Báb, Baháʼu'lláh, ʻAbdu'l-Bahá, Shoghi Effendi and the Universal House of Justice, and the authenticated talks of ʻAbdu'l-Bahá.