" The call for justice was a protest as fierce as those of the biblical prophets and of Jesus, and the similarity of the call was no coincidence. As with early Judaism and early Christianity, early Islam would be rooted in opposition to a corrupt status quo. Its protest of inequity would be an integral part of the demand for inclusiveness, for unity and equality under the umbrella of the one god regardless of lineage, wealth, age, or gender. This is what would make it so appealing to the disenfranchised, those who didn't matter in the grand Meccan scheme of things, like slaves and freedmen, widows and orphans, all those cut out of the elite by birth or circumstance. And it spoke equally to the young and idealistic, those who had not yet learned to knuckle under to the way things were and who responded to the deeply egalitarian strain of the verses. All were equal before God, the thirteen-year-old Ali as important as the most respected graybeard, the daughter as much as the son, the African slave as much as the highborn noble. It was a potent and potentially radical re-envisioning of society.

This was a matter of politics as much as of faith. The scriptures of all three of the great monotheisms show that they began similarly as popular movements in protest against the privilege and arrogance of power, whether that of kings as in the Hebrew bible, or the Roman Empire as in the Gospels, or a tribal elite as in the Quran. All three, that is, were originally driven by ideals of justice and egalitarianism, rejecting the inequities of human power in favor of a higher and more just one. No matter how far they might have strayed from their origins as they became institutionalized over time, the historical record clearly indicates that what we now call the drive for social justice was the idealistic underpinning of monotheistic faith. "

― Lesley Hazleton , The First Muslim: The Story of Muhammad