The unity of man is repeatedly emphasised for instance:
O ye people! fear your Lord, Who created you from a single soul and created therefrom its mate, and from them twain spread many men and women (Ch.4: V 2)
And again
And one of His signs is this, that He has created wives for you from among yourselves that you may find peace of mind in them, and He has put love and tenderness between you. In that, surely, are Signs for a people who reflect. (Ch.30: V.22)
The universe has been created with a purpose:
And We created not the heaven and the earth and all that is between the two in play. If We had wished to find a pastime, We would surely have found it in what is with Us if at all We were to do such a thing. (Ch.21: Vs.17-18)
Again,
We have not created the heaven and the earth and all that is between them in vain. That is the view of those who disbelieve. (Ch.38 :V28)
And Allah has created the heavens and the earth with truth, and that every soul may be requited for that which it earns; and they shall not be wronged. (Ch.45: V.23)
God has set up a balance, so that the truth and justice may be established.
Verily, We sent Our Messengers with manifest Signs and sent down with them the Book and the Balance that people may act with justice…(Ch.57: V26)
The heaven He has raised up high and set up a measure that you may not transgress the measure. So establish the Balance with justice and fall not short of the measure.
Unfortunately, however, religion itself, instead of being made the means of promoting amity, concord and brotherhood, has often been abused for the purpose of promoting discord and hostility between different sections of mankind. The attitude of Islam towards other faiths is calculated to eliminate all discord and conflict, and to bring about and promote beneficent relationship.