Almighty Allah has made the Prophethood of the Holy Prophet (Sallallahu alaihi wa sallam) universal. He is not the Prophet for any particular nation or country but He is the Divine Guide for the whole creation. Almighty Allah says:
Blessed is He (Allah) Who sent down to His (most beloved and most intimate) servant the Criterion (the Quran) that (draws the difference between right and wrong and) gives judgment in order that he may be a Warner to all the worlds; Surah Furqan (25:1)
The message of the Prophethood of the Holy Prophet (Sallallahu alaihi wa sallam) covers all aspects of life. It is equally beneficial for all classes and groups. After the Holy Prophet (Sallallahu alaihi wa sallam) came, those who worshipper their false “gods” started worshipping the One True Lord. He (Sallallahu alaihi wa sallam) safeguarded humanity. He granted the rights due to the weak folk. He freed humanity from the shackles of slavery and oppression and granted it the right to lead a free life. He turned those who committed indecencies into epitomes of high morals. He dispelled the gloom of terror and barbarism and spread the light of peace and security. Even those who spread thorns in His path were rewarded with prayers of guidance and good wishes. He gave such a lesson to a bloodthirsty nation that sworn enemies became brother to each other. Almighty Allah mentions this great favor of the Holy Prophet (Sallallahu alaihi wa sallam) in the Holy Quran:
And hold fast to the rope of Allah, all of you together, and do not generate dissension and factions. But call to mind the blessing of Allah upon you when you were enemies (one to another). Then He created the bond of love amongst your hearts, and by His blessing you became brothers. And you (had reached) the brink of a pit of the Fire (of Hell) but He rescued you from it. That is how Allah elaborates His signs to you that you may take guidance to the right path. Surah Ale Imran (3:103)
The Holy Prophet (Sallallahu alaihi wa sallam) lived for 40 years in Makkah before the Declaration of Prophethood. His life, His morals, the transparency of His affairs, His high character and His love for truth forced others to admit that the Holy Prophet (Sallallahu alaihi wa sallam) is the Truthful (Sadiq) and Trustworthy (Ameen).
For this reason, Almighty Allah declares His very presence as a great bounty and His Prophethood as a great favor. Almighty Allah says in the Holy Quran:
Indeed, Allah conferred a great favour on the believers that He raised amongst them (the most eminent) Messenger (blessings and peace be upon him) from amongst themselves, who recites to them His Revelations, purifies them, and educates them on the Book and Wisdom though, before that, they were in manifest error. Surah Ale Imran (3:164)