Fast facts
- The word
- Islam (الإسلام), from س ل م: submission, and the peace that follows it
- Began
- Arabia, in the early seventh century CE
- Sources
- The Qur'an (القرآن) and the Sunnah (السنة) of Muhammad ﷺ
- Adherent
- A Muslim (مسلم), one who submits
- Kin religions
- Judaism and Christianity, sharing the line of Ibrahim (إبراهيم) (عليه السلام)
On this page
What the word means
Islam (الإسلام) is a verbal noun from the root س ل م, which carries both submission and peace. The two senses are not accidental. The claim built into the name is that peace is what follows from submitting to the One who made you, and that a life ordered any other way is at war with something.
A Muslim (مسلم) is simply one who does that submitting. The word describes a relationship rather than an ethnicity or a region, which is why the largest Muslim populations today are not Arab and never have been.
Where it began
The revelation began in Arabia in the early seventh century CE, to Muhammad ﷺ (محمد) of Makkah (مكة), in his fortieth year. It continued for roughly twenty-three years, ending shortly before his death in 632 CE. That period covers the whole of the Qur’an (القرآن).
Islam does not present itself as beginning there. Its own account is that it is the final statement of one message given to every people, and it names the earlier prophets as bringing the same thing: Ibrahim (إبراهيم), Musa (موسى) and ʿIsa (عيسى) (عليهم السلام) among many. This is why it stands with Judaism and Christianity as an Abrahamic religion rather than as an unrelated fourth thing.
What it rests on
Two sources, in order. The Qur’an (القرآن) is held to be the speech of Allah, transmitted through the Prophet ﷺ and preserved in the Arabic in which it was given. The Sunnah (السنة) is the recorded practice of the Prophet ﷺ, transmitted as hadith (حديث), which shows what the Qur’an looks like when a human being actually lives it.
The second exists because the first is often deliberately brief. The Qur’an commands the prayer without setting out its every movement, so the pattern is that revelation states the obligation and the Prophet ﷺ demonstrates its form. Removing the second source does not simplify the religion; it leaves the first unusable.
What the Sunnah is, and why it is needed
Sunnah (السنة) means a trodden path. In use it covers what the Prophet ﷺ (محمد) said, did, and allowed by his silence. It is transmitted as hadith (حديث), and the two words are not synonyms: the Sunnah is the practice, and a hadith is a report of it.
The need for it is structural rather than sentimental. The Qur’an commands the prayer perhaps seventy times and never once describes how to perform it. It commands zakat (الزكاة) without stating the threshold or the rate. It commands hajj (الحج) without setting out the rites. A reader with the Qur’an alone would know exactly what is required and have no way to do any of it.
That gap is deliberate, and the Qur’an says so. It gives the Messenger the task of making clear what was sent down: Sūrah al-Naḥl 16:44. It makes obedience to him a form of obedience to Allah: Sūrah al-Nisāʾ 4:80. And it presents him as the pattern to be copied rather than merely a courier of text: Sūrah al-Aḥzāb 33:21.
Reports are also graded rather than accepted flat. The science of hadith criticism assesses each chain of narrators and classifies the result as sound, good, weak or fabricated, and a weak report does not establish a ruling. That machinery exists precisely because the second source had to be defensible, and it is why a page on IDS will sometimes say that a widely quoted saying is weak.
The three levels: islam, iman, ihsan
The most useful answer to "what is Islam" is the one the Prophet ﷺ gave when a stranger asked him in front of his companions. The stranger, later identified as Jibril (جبريل) (عليه السلام), asked three questions in sequence.
- Islam (الإسلام), what you do: the testimony, the prayer, the zakat (الزكاة), the fast, and the pilgrimage. See The Five Pillars.
- Iman (إيمان), what you hold: belief in Allah, His angels, His books, His messengers, the Last Day, and the divine decree.
- Ihsan (إحسان), how you do it: "that you worship Allah as though you see Him, for if you do not see Him, He surely sees you."
The order is the point. Outward practice, inward belief, and the quality that turns both into something more than compliance. A description of Islam that stops at the first level is accurate and badly incomplete (Sahih Muslim 8).
Not only a private matter
Islam legislates in areas most modern religions leave alone: inheritance, contract, marriage, warfare, taxation, the treatment of debtors. This is often read from outside as overreach. From inside it follows from the premise: if the Creator has an interest in how you pray, He has an interest in how you trade, and drawing a line between the two would be the strange move.
The Qur’an describes the community it forms as a middle one, positioned to bear witness rather than to withdraw: Sūrah al-Baqarah 2:143. And it grounds human difference in design rather than accident, which is the basis on which it addresses everyone: Sūrah al-Hujurat 49:13.
Frequently asked questions
Is Islam an Arab religion?
No. It began in Arabia and its scripture is in Arabic, but Arabs are a minority of Muslims. Indonesia, Pakistan, India and Bangladesh hold far larger Muslim populations than any Arab state. The Qur’an addresses humanity rather than a people, and Sūrah al-Hujurat 49:13 makes ancestry a means of recognition rather than a rank.
How is Islam related to Judaism and Christianity?
It regards itself as the same message restated, not a different one. It affirms Musa (موسى) and ʿIsa (عيسى) (عليهما السلام) as prophets, accepts that scripture was given to both communities, and differs over what happened to those scriptures afterwards and over the nature of ʿIsa (عليه السلام). The shared root is Ibrahim (إبراهيم) (عليه السلام).
What is the shortest honest summary?
That there is one God, that He has spoken, that the record of His speech is the Qur’an (القرآن), that Muhammad ﷺ was the last to carry it, and that a person is accountable for what they do with that. Everything else in the religion is detail hanging off those five statements.