God created man and bestowed His numerous bounties upon him including the gift of intellect and thinking which distinguishes him from other creatures. God has also obligated man to fulfill certain duties and obligations which are by themselves considered to be God's blessings upon mankind. If man has duties to perform, then it would necessitate prophets to be appointed and sent to deliver divine injunctions to him, otherwise duty would be nonsensical or meaningless. The divine prophets were men commissioned by God to deliver His message and commandments to mankind. God's habit or sunnah was to send from every nation and people someone to them for their guidance as evidenced by the Holy Quran:
"And certainly We raised in every nation a messenger …"[1]
There are also other verses which refer to the same fact.[2]  Hence, there is no doubt that  wherever there were people or tribes, God sent them messengers for their guidance.[3] But the names of all of those prophets have not been mentioned in the Quran and sayings of the Infallibles (AS). It has been simply stated in some of our narrations that God sent one hundred twenty four thousand prophets and in some other narrations it has been mentioned that God sent eight thousand prophets along with miracles to guide mankind in the right path.[4] The Holy Quran has mentioned names of only 25 prophets. Perhaps, the same number of prophets has been reported in traditions.  The difference between 25 prophets and 8 thousand or 125 thousand prophets is poles apart.  It is the Quran that says, "And (We sent) messengers We have mentioned to you before and messengers we have not mentioned to you…"[5]
Elsewhere the Quran says, "We did aforetime send messengers before thee: of them there are some whose story We have related to thee, and some whose story We have not related to thee. It was not (possible) for any messenger to bring a sign except by the leave of Allah…"[6] All of this can be confirmation of what theologians have said that there had been a religion in every nation.
In his The World's Living Religions, Rebert Hume says, "In the history of mankind, never has there been a tribe which might not somehow have had a religion." He further says that religion is something that distinguishes man from animals.[7]
Naturally, we must differentiate between the world's living religions and other religions which have now perished. He says, "Asia is the birthplace of all the world's living religions."[8] However, he names some of the religions which no longer exist and have perished  and that shows that prophets as the bearers of divine religion existed in all places where human beings settled and inhabited. He says: "religions existing in ancient Egypt in Africa, Mexican religions and religions in ancient Peru in America…"[9]
We can conclude therefore that there were numerous prophets whose names God did not mention in the Quran.[10] Perhaps, the fact that all peoples and nations have had religions is confirmed by theologians or ethnologists. However, since Allah seeks to make use of the life and history of the prophets to educate human generations, He has mentioned the story of the prophets sent to people in the Middle East. Because only the history and works of the prophets' tribes and people were available to people of that time and it was easier for people of that time to know them. That is why the Quran refers to prophets in different chapters calling on people to see the legacies and ruins of the civilizations of people who rejected those prophets. It says:
"Therefore travel in the land, then see what was the end of the rejecters (and learn a lesson from them)"[11] For this reason, if Moses' stories have been referred to very often by the Quran, it is because there are occasions in them which can serve as good lessons for others especially when it comes to Muslims' confrontation with the People of the Book.
It has been also considered probable that the advent of various civilizations in the Middle East, as some archeologists have noted, is the reason requiring prophets to be sent to this region. This is also affirmed by those who have studied the nations' history of civilization.
In fact, we must note that circumstances and situations play a key role in this regard. No prophet was sent unless required due to special temporal and spatial circumstances. God is well aware of the causes and reasons behind the prophetic mission of a prophet.  Perhaps, it can be said that in certain places like Palestine, Arabian Peninsula, Makkah and Medina, more men of religion were ready to embrace the truth as was the case with Greece where the situation was propitious for philosophers to emerge. In any case, this is something divine and God knows it best. Whatever the reason or purpose, the prophets who have been spoken about in the Quran emerged from these sacred lands. There is no doubt in the fact that all the existing great religions in today's world were born in the Middle East causing all other religion over the centuries to perish and calling upon their followers to follow the succeeding religions. If Christianity is the predominant religion in Europe and America and has millions of follower, it was, like all other Abrahamic religions, born in Asia, particularly Middle East. But that does not mean that divine prophets did not emerge in other parts of the world. If no religion other the existing ones are found across the world, it does not signify that there were no prophets in other parts of the world. Indeed, if a divine prophet is proved unquestionably to have existed in any places other than Middle East, it will be accepted.  Now-a-days, signs of theistic beliefs and worship of God are seen with the primitive tribes in America or the red Indians. These signs indicate the teachings of divine prophets.
Therefore, from the first day of creation wherever there were human beings, God sent them prophets to guide them and tell them their duties.  However, their names and stories have not been mentioned in the divine books including the Quran. Of course, it has not been necessary to mention their names and stories given the goals and objectives which the Quran pursued.

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