Four Rightly Guided Caliphs

The Rightly Guided Caliphs or The Righteous Caliphs ( ) is a term used in Sunni Islam to refer to the first four Caliphs. The concept of "Rightly Guided Caliphs" originated with the Abbasid Dynasty. It is a reference to the Sunni tradition, "Hold firmly to my example (sunnah) and that of the Rightly Guided Caliphs" (Ibn Majah, Abu Dawood).
See more at Wikipedia.org...

These are Abu Bakr , Umar , Uthman , and Ali . They are the first four leaders of Islam after the death of Mohammed . They took the title "caliph" to make it clear that they were not a prophet like Mohammed; it is often translated as "vice-regent," which indicates that the holder is an administrator (as well as a warrior). After the killing of Ali, the Umayyad dynasty became the leaders of the Islamic world. See also Caliph .