When we compare the pair of Islamic with our pair of Christian societies we see that the Islamic Society which emerged in what we may call the Perso-… - Arnold J. Toynbee

As the Macedonian conquest, by breaking up the Achaemenian Empire (i.e. the Persian Empire of Cyrus and his successors), prepared the soil for the seed of Hellenism, so the Arab conquest opened the way for the Umayyads, and after them the 'Abbasids, to reconstruct a universal state which was the equivalent of the Achaemenian Empire.

Civilization, as we know it, is a movement and not a condition, a voyage and not a harbour. No known civilization has, ever reached the goal of civilization yet. There has never been a communion of saints on earth. In the least uncivilized society at its least uncivilized moment, the vast majority of its members have remained very near indeed to the primitive human level. And no society has ever been secure of holding such ground as it has managed to gain in its spiritual advance.

So-called racial characteristics are not really racial at all but are due to the historical experiences of the communities in question.