The First Fitna, which created the Shia–Sunni split over the rightful caliph, had a great impact on Arabic literature. Whereas Arabic literature—along with Arab society—was greatly centralized in the time of Muhammad and the Rashidun, it became fractured at the beginning of the period of the Umayyad Caliphate, as power struggles led to tribalism. Arabic literature at this time reverted to its state in "al-Jahiliyyah", with markets such as Kinasa near Kufa and near Basra, where poetry in praise and admonishment of political parties and tribes was recited. Poets and scholars found support and patronage under the Umayyads, but the literature of this period was limited in that it served the interests of parties and individuals, and as such was not a free art form.