 The Umayyad rule, with its wealth and luxury also seemed at odds with the Islamic message preached by Muhammad.All this increased discontent.The descendants of Muhammad's uncle Abbas ibn Abd al-Muttalib rallied discontented "mawali", poor Arabs, and some Shi'a against the Umayyads and overthrew them with the help of the general Abu Muslim, inaugurating the Abbasid dynasty in 750, which moved the capital to Baghdad.