Riḍā names Arab prophets, presents Muhammad as the completion of religion, and puts moral reform before scientific progress. Qur'an 3:85 confirms the Arabic verse he quotes. His identification of Shuʿayb as Moses's father-in-law is traditional interpretation rather than direct Qur'anic wording: Qur'an 28:22-28 describes an unnamed father with two daughters, while Exodus 2:16-21 names the father Reuel. These texts verify the narrative link but not the identification.
Riḍā then attributes to Gustave Le Bon a superlative about the justice and mercy of Arab conquerors. Le Bon's 1884 French work makes related claims about the conduct of Arab conquerors, but the exact French wording behind Riḍā's Arabic quotation was not located in the consulted electronic edition. Neither the attributed sentence nor Le Bon's argument independently proves Riḍā's broad account of conquest and conversion. This page shows how Riḍā used religious authority and a European scholar to defend his account of Arab rule. The sentence on learning Arabic continues on p. 459.
The imperial chronology requires three further limits. Arab armies defeated Sasanian power rapidly, but the eastern Roman or Byzantine empire survived until 1453, so ʿUmar did not topple both imperial thrones. Arab forces did besiege Constantinople within the first Islamic century, in 674-678 and 717-718, but both attacks failed. The evidence for Kashgar supports a raid in 715, while the city remained under Chinese administration and a local dynasty later in the eighth century. Riḍā therefore combines real military expansion with claims of conquest and imperial collapse that the checked chronologies do not fully support.
Conversion did not simply follow the timetable of conquest. The New Cambridge History of Islam says the scholarly consensus now places the age of conversions across at least the first three Islamic centuries. In most regions the steepest growth came in the ninth and tenth centuries, and conversion in al-Andalus continued into the twelfth. This challenges Riḍā's account of conquered peoples immediately entering Islam in groups because they preferred Arab justice. It does not replace that account with a claim of uniform compulsion. Timing and motives varied by region, and voluntary conversion remained part of the process.
The Qur'anic source partly matches Riḍā's list of Hūd, Ṣāliḥ, and Shuʿayb. Qur'an 7 places each name in a mission narrative tied respectively to ʿĀd, Thamūd, and Midian. The verses support the textual identification as prophetic or messenger figures, but they do not collectively call the three Arab. The text check also does not independently establish historical existence or ethnicity.
The Qur'an also names Dhū al-Qarnayn, Luqman, and the people of Tubbaʿ without identifying any of them as a prophet. Qur'an 18 introduces Dhū al-Qarnayn's narrative, Qur'an 31 says Luqman received wisdom, and Qur'an 44 names the people of Tubbaʿ. The commentary presented with Qur'an 31:12 reports an early disagreement over Luqman's status and says the majority regarded him as a righteous servant rather than a prophet. This supports Riḍā's description of a later interpretive dispute at least for Luqman, while keeping it separate from the direct wording of the Qur'an.
The ideal of equal rights did not always describe the practice of early Arab rule. Najam Haider describes non-Arab Muslim converts under the Umayyads as theoretically equal to Arab Muslims but subject to severe discrimination, especially in taxation. Patricia Crone likewise places non-Arab converts in client relationships with Arab tribes. This limits Riḍā's historical generalization while leaving the normative Islamic principle of equality distinct from its uneven application.