According to Islam, all human beings have been created by one and the same God, and for this reason belong to one great brotherhood. So far as their earthly origin is concerned, they are all descendants of the first pair of human beings ever created by God- Adam and Eve. In their subsequent spread over different parts of the world, variations in geographical conditions produced a diversity of skin colourings, languages and other racial characteristics.
The teaching of Islam in this regard is that despite differences of colour, language, etc., people should harbour no ill-will towards those who are apparently unlike themselves, for differentiating between one man and another is not approved by God. They should rather promote fellow feeling towards others, even if at first glance they appear like total strangers to them. Bearing in mind that they are all traceable back to Adam and Eve, they should be each other's well-wishers and willingly come to one another's assistance, like members of the same large family.
Ideally, the relation between one man and another ought not to be one of strangeness but one of familiarity; not of distance but of nearness; not of hatred but of love.
When all human beings are descendants of the same progenitors that means that all are equal: no one is superior or inferior. The distinction between great and small is not between one human being and another, but between God and man. And before God, certainly, all human beings are equal; all are equally His creatures and His servants. For God does not discriminate between one or the other of His creations.