This is not surprising...

This is not surprising, of course, because the foregoing detailed condition is the fruit of their own deeds: "...and Allah provides with sustenance for whomever He wills without measure." These facts are, indeed, some glad tidings for the poor believers and also a severe warning to the rich who are proud and faithless unto the Truth.

And the phrase stating that 'Allah provides with sustenance for whomever (here, the believers) He wills without measure' may point to this idea that Divine rewards, from the view of quantity and quality, are never equivalent to our good deeds. They are bestowed according to His Grace and Generosity, and, also, we know that there is no limit to the Grace and Generosity of Allah.

"(All) Mankind was but a single nation, then Allah raised Prophets as bearers of good tidings and warners, and He sent down with them the Book with the Truth that it might judge between people on that wherein they differed. And none were at odds over it, except those very (people) whom it was given unto, after clear arguments had come to them, revolting among themselves. So Allah guided by His Will, those who believed regarding that which people had differed about the truth.

And Allah guides whomever He wills to the Straight Path." It is understood from this verse that human race had a simple and plain life at the beginning. Then, later, after the increase of population and the appearance of a variety of tastes among them, little by little, diversities and oppositions arose.

"(All) Mankind was but a single nation..." As some Islamic traditions indicate, this period has been adapted to an Age before the time of Noah (as) when people, with little information, used to live a simple limited life. But, sometime later there appeared some conflicts between individuals when they wanted to gain more and more interests especially by employing others for reaching the foregoing purposes via them. This caused that the classes of people and social levels came into existence.