Sunni and Shia
Origins, anatomy, diffusion. Three long reads that try to explain the divergence without taking a side, and that say plainly where the evidence runs out.
Origins, anatomy, diffusion. Three long reads that try to explain the divergence without taking a side, and that say plainly where the evidence runs out.
The three parts
Each stands on its own. Read them in order if you want the argument to build; jump straight to whichever question brought you here if not.
How Sunni and Shia Came to Be
The succession question, the scriptural evidence read by both traditions in their own terms, and the timeline of a divergence that took three centuries to finish.
The House and the Schools
The genealogy from the Prophet ﷺ to living claimants, every school broken down by the method it actually uses, and an honest answer to the fidelity question.
How Islam Travelled
How each school reached the countries it holds today. A map of the madhhabs is a map of medieval states, caravan roads and monsoon winds, not of doctrine.
How this is written
Three commitments govern all three parts, and they are worth stating before you start.
Both sides in their own terms
Where the traditions read the same verse or hadith differently, both readings are given as their own scholars would state them, and no verdict is appended. Where one tradition rejects a report the other accepts, that is stated rather than smoothed over.
Sources labelled by provenance
A report from Ṣaḥīḥ al-Bukhārī is a Sunni canonical source. One from al-Kāfī is a Twelver canonical source. A date from al-Ṭabarī is third-century historiography with its own problems. Every hadith carries a collection and number you can check.
The limits are marked
Contested dates say so. Figures that circulate widely but are weakly sourced are named as such and not repeated. Where a causal story is modern scholarly inference rather than documented event-history, the text says which it is.
Nobody at the Prophet’s funeral belonged to a sect
What existed in 632 was a political crisis, then a civil war, then a set of unresolved arguments about authority. Only across the following two to three centuries did those arguments harden into two traditions with their own hadith canons, legal systems, theologies and rituals.
Reading the schism backwards into 632 is the most common error in popular accounts, on every side. Said plainly, because these pages give both traditions their own terms everywhere else: this historicist framing is itself a frame, not the view from nowhere. Each tradition holds that its own position is what the Prophet left and the other is the departure, and neither concedes the account below.
What is actually counted
One figure to set expectations before you read any percentage anywhere in this series, or anywhere else.
↔ Scroll the figure sideways
Siddiqui, M. “Sunni and Shia: origins, anatomy, diffusion.” mohammadsiddiqui.com.
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