Abdu'l-Bahá, born on May 23, 1844, and died on November 28, 1921, was the second prophet of the Baha'i Faith. His full name was Muhammad 'Ali Muhammad and he was the son of Baha'u'llah. Abdu'l-Bahá played a crucial role in the Baha'i Faith, spreading the teachings of his father and promoting the religion globally. His teachings emphasized unity, peace, equality, and love.