The Bahá'í Faith is a monotheistic religion founded by Bahá'u'lláh in nineteenth-century Persia, emphasizing the spiritual unity of all humankind.There are an estimated five to six million Bahá'ís around the world in more than 200 countries and territories.------------ Bahá'í teachings emphasize the underlying unity of the major world religions. Religious history is seen to have unfolded through a series of divine messengers, each of whom established a religion that was suited to the needs of the time and the capacity of the people. These messengers have included Krishna, Abraham, the Buddha, Jesus, Muhammad and others, including most recently Bahá'u'lláh. In Bahá'í belief, each messenger taught of the next, and Bahá'u'lláh's life and teachings fulfil the end-time promises of previous scriptures. Humanity is understood to be involved in a process of collective evolution, and the need of the present time is for the gradual establishment of peace, justice and unity on a global scale.------------- The word "Bahá’í" is used either as an adjective to refer to the Bahá'í Faith or as a term for a follower of Bahá'u'lláh, and the word is not a noun meaning the religion as a whole. It is derived from the Arabic Bahá’, meaning "glory" or "splendour".The term "Bahaism" (or "Baha'ism") has been used in the past, but is fading from use.