Hand of the Cause was a title given to prominent early members of the Baháʼí Faith, appointed for life by the religion's founders. Of the fifty individuals given the title, the last living was ʻAlí-Muhammad Varqá who died in 2007. Hands of the Cause played a significant role in propagating the religion, and protecting it from schism.

Shoghí Effendi (; 1 March 1897 – 4 November 1957) was the grandson and successor of ʻAbdu'l-Bahá, appointed to the role of Guardian of the Baháʼí Faith from 1921 until his death in 1957. He created a series of teaching plans that oversaw the expansion of the faith to many new countries, and also translated many of the writings of the Baháʼí central figures. He was succeeded by an interim arrangement of the Hands of the Cause until the election of the Universal House of Justice in 1963.