Re: curious mind
That is because such is the Will of Allah (SWT).
Here's a verse that I believe is relevant to your query.
[QUOTE]
49:13 O mankind! We created you from a single (pair) of a male and a female, and made you into nations and tribes, that ye may know each other (not that ye may despise (each other). Verily the most honoured of you in the sight of Allah is (he who is) the most righteous of you. And Allah has full knowledge and is well acquainted (with all things).
[/QUOTE]
I'll try to post its tafsir sometime soon, insha'Allah.