Islam is the religion taught in its fundamentals by all the prophets. It is the religion which the first human being was instructed to follow. It is the religion of Noah, Abraham, Moses, Jesus and Muhammad and all other prophets (peace be upon them all) throughout the existence of human beings.

From the world view of Islam, most of the world's major religions originated in the pure religion of Islam itself and only through the teachings being lost, forgotten or wilfully corrupted have these religions changed. Judaism claims special status for the Jews as the chosen people - a status which cannot be acquired except through birth [1] and which makes a Jew superior to any non-Jew (goyim) whatever their beliefs. Christianity insists that you must believe in various doctrines which form the foundations of what is distinctively 'Christian' belief in order to be 'saved' (i.e. that Jesus (peace be upon him) died to atone for the sins of Mankind, that Allah is a trinity etc.). This doctrine, the (Catholic) church itself admits [2], didn't develop until several hundred years after Christ and so cannot possibly have applied to those before Jesus nor to his early followers. In contrast to this, Islam has at its core, a simple message which applies to all human beings before Muhammad (pbuh) and all after his time:

"...And they say: "None shall enter paradise unless he be a Jew or a Christian." Those are their (vain) desires. Say: "Produce your proof if you are truthful." Nay whoever submits his whole self to Allah and is a doer of good, he will get his reward with his Lord; on such shall be no fear nor shall they grieve."

Qur'an 2:111-112

The word used in this verse for 'submits' is 'aslama'. It is from this verb that the word 'Islam' comes as 'the submitting'. Islam is a word that doesn't have any connection with an area or a particular character from history, it is the one and only truly universal religion and fittingly it has a truly universal name:

The word "Islam" means voluntary submission to the will of Allah