Allah is a Master-Artist in his Creation

" وَمِنْ آيَاتِهِ خَلْقُ السَّمَاوَاتِ وَالْأَرْضِ وَاخْتِلَافُ أَلْسِنَتِكُمْ وَأَلْوَانِكُمْ ۚ إِنَّ فِي ذَٰلِكَ لَآيَاتٍ لِّلْعَالِمِينَ "
"And of His Signs is the creation of the heavens and the earth and the diversity of your tongues and colours. Indeed there are Signs in this for the wise."

Although your vocal chords are similar, and there is no difference in the structure of the mouth, the tongue and the brains, yet people speak different languages in different regions of the world. Even in the regions where the same language is spoken different dialects are spoken from city to city and from town to town. Moreover, the accent and pronunciation and the style of speech of every person is different from the other. Similarly, although the semen and the formula of your physical structure is the same, yet your colours are so different , even the colour of the two sons of the same parents is not exactly the same. In this verse, attention has been drawn only to two aspects, but if one looks around they will notice an unite variety everywhere in the world. One will find countless differences in the species of man, animals, plants and other things in spite of the basic uniformity in their different members; so much so that no member of the species is exactly identical with the other.

Anyone who sees this wonderful phenomenon with open eyes, can never be involved in the foolish misconception that the Maker of the universe has gone to sleep after having made it go.