RT Article T1 The Evolution of Government in Early Islam JF Studia Islamica VO 4 SP 5 OP 17 A1 Gibb, Hamilton Alexander Rosskeen 1895-1971 LA English PB Brill YR 1955 UL https://ixtheo.de/Record/1689158395 K1 Abbasid Caliphate K1 Caliphs K1 Civil Wars K1 Early Islam K1 Government crises K1 Morality K1 Political Ideologies K1 Political institutions K1 Social institutions K1 Umayyad Caliphate DO 10.2307/1595048