The Prophet Muhammad (PBUH) was born in Arabia round the year 570 of the Christian era, and died in the year 632. There he was spent all his life and the Prophet Muhammad (SAW) was never out of the peninsula except when he made two commercial trips to Syria in the early part of his life.
We should not be led to understand that the Prophet Muhammad (SAW) was the author of the teaching he delivered to his followers. It is all believed to have been the revelation from Allah (God), the Almighty; and Muhammad (PBUH) was merely chosen (Messenger) to be the instrument through which the Islamic teaching was passed on to the creatures of God.
I also want to make clear that the teaching brought about by the Prophet Muhammad (PBUH) does not need to be fundamentally different from that taught by earlier prophets, such as Prophet Abraham, Moses and Jesus Christ. Allah said in the Quran:
وَاسْأَلْ مَنْ أَرْسَلْنَا مِنْ قَبْلِكَ مِنْ رُسُلِنَا أَجَعَلْنَا مِنْ دُونِ الرَّحْمَنِ آلِهَةً يُعْبَدُونَ
And ask (O Muhammad SAW) those of Our Messengers whom We sent before you: “Did We ever appoint âliha (gods) to be worshipped besides the Most Beneficent (Allah)?”
All The Prophet Conveyed the Same Message (Belief in Prophets)
The fundamental part of a religion, as far as we can see, is the ideas God and His relation to the world, and the ideas about those whom God selected to His Messengers. This part deals with truths; and truths cannot change with the passage of time. Muslims believe therefore, that their faith is identical with the original faiths taught in earlier religions before they were tampered with through misunderstanding and through other factors. In addition to this similarity of faith, other striking similarities can be easily found in the ethical teachings of those religions. In this connection the only Quran says:
وَلَقَدْ أَرْسَلْنَا رُسُلًا مِنْ قَبْلِكَ مِنْهُمْ مَنْ قَصَصْنَا عَلَيْكَ وَمِنْهُمْ مَنْ لَمْ نَقْصُصْ عَلَيْكَ وَمَا كَانَ لِرَسُولٍ أَنْ يَأْتِيَ بِآيَةٍ إِلَّا بِإِذْنِ اللَّهِ فَإِذَا جَاءَ أَمْرُ اللَّهِ قُضِيَ بِالْحَقِّ وَخَسِرَ هُنَالِكَ الْمُبْطِلُونَ
“He had instituted for you in religion What He has laid up on Noah, and that which We have revealed unto you and that which We had instituted for Abraham, Moses and Jesus, commanding: Establish your religion and do not divide into parties regarding it.”