The Baha'i Faith is a religion founded by Baha'u'llah in 19th-century Persia, emphasizing the spiritual unity of all humankind. There are around six million Baha'is in more than 200 countries and territories around the world.
According to Baha'i teachings, religious history has unfolded through a series of God's messengers who brought teachings suited for the capacity of the people at their time, and whose fundamental purpose is the same. Baha'u'llah is regarded as the most recent, but not final, in a line of messengers that includes Abraham, Buddha, Jesus, Muhammad and others. Baha'u'llah's claim to fulfill the eschatological promises of previous scriptures coincides with his mission to establish a firm basis for unity throughout the world, and inaugurate an age of peace and justice, which Baha'is expect will inevitably arise.
Baha'i can be an adjective referring to the Baha'i Faith, or used as a term for a follower of Baha'u'llah. (Baha'i is not a noun meaning the religion as a whole.) The word comes from the Arabic word Baha', meaning "glory" or "splendour". "Bahaism" (or "Baha'ism") has been used in the past but is fading from use.