The Unyielding Shari'a: Ibn Hazm, Political Flux, and the Zahiri Doctrine — Epoche C2
The doctrine, and the question it raises Ibn Ḥazm of Córdoba (994–1064) held that no human authority may add a rule to the revealed law of Islam, remove one from it, or suspend one in the light of changed circumstances — and he held this at a moment when political authority in al-Andalus had disintegrated so completely that there was scarcely anyone left with the standing to try. He is also the great systematiser of the Ẓāhirī school of jurisprudence, the school of the manifest sense, which confines legal reasoning to the plain wording of the Qurʾān and of the reports of the Prophet's practice, and rejects the inferential techniques by which the other Sunni schools extend the law to cases the texts do not name. The natural thing to say is that the first fact follows from the second: a law that may not be read beyond its wording is a law that cannot be adjusted. That is roughly what the survey literature says. The essay as previously published attributed the view to W. Montgomery Watt's Islamic Political Thought ; the attribution will not hold, since that book is a compact survey of the caliphate, the community and the sects and argues nothing so specific about Ibn Ḥazm, and it was in any case misdated, the volume having appeared in 1968. The reading itself, though, has no single owner and is worth taking seriously on its own account. The claim of this essay is that it fails — not because Ẓāhirī method is irrelevant to the doctrine, but because it underdetermines it at precisely the point where the doctrine does political work. The first step is to separate two claims that the word "immutable" runs together, because only one of them is a claim about how to read a text. Content-fixity. The rules of the law do not vary with time, place or advantage: what the texts require of a Muslim in Córdoba in 1050 is what they required in Medina, and no argument from changed conditions alters it. The anti-legislative corollary. No human office, the imamate included, contains a power to make law. The ruler's commands bind, when they bind, only as administration within a law he did not enact and cannot amend. Content-fixity is a thesis about interpretation. The anti-legislative corollary is a thesis about the constitution of authority — about what an office contains. The derivation reading assumes the second follows from the first. It does not, and the gap between them is where the historical question lives. What Ẓāhirī method actually forbids, and what it therefore permits To see the gap one has to be exact about the method, because its most striking consequence runs opposite to the direction the derivation reading needs. The technique Ibn Ḥazm attacks hardest is qiyās : the extension of a ruling from a case the texts name to a case they do not, on the ground that the two share the operative feature — the ʿilla — for whose sake the ruling was given. Wine is forbidden by an explicit text; date liquor is not named; the jurist who judges that the ʿilla of the prohibition is intoxication extends the prohibition to date liquor. Ibn Ḥazm's objection in al-Iḥkām fī uṣūl al-aḥkām , his treatise on legal method, is not that the conclusion is offensive but that the middle step is unavailable. The texts almost never state the ʿilla ; the jurist supplies it; and supplying it is conjecture. The Qurʾān repeatedly denies that conjecture yields knowledge and forbids following what one does not know (10:36, 17:36, 53:28). To legislate by qiyās is therefore to attribute to God a rule He did not give, on a warrant the Qurʾān itself refuses. The same argument disposes of juristic preference ( istiḥsān ) and of rulings grounded in the public benefit, both of which require the jurist to identify a purpose behind the text. Consensus ( ijmāʿ ) survives, but barely. Ibn Ḥazm accepts it as a source and then restricts it to the agreement of the Prophet's Companions, on the ground that a consensus binds only if it can be shown to have obtained, and only that generation was small enough and well enough recorded for the showing to be possible. A consensus of jurists spread across three continents is an assertion, not a fact. What survives is what he calls dalīl — a proposition entailed by the wording of a text, drawn out of it rather than carried from it to a new case. He was emphatically not an enemy of inference as such: he wrote an introduction to Aristotelian logic, al-Taqrīb li-ḥadd al-manṭiq , arguing that the syllogism is a neutral instrument that no religion has cause to fear, and he was attacked for it. The line he wants is between an inference that stays inside the meaning of the text and one that leaves it in search of a cause. Whether the line holds under pressure is the main question that modern re-examinations of his literalism have raised, since several of his dalīl arguments look, to a hostile eye, like analogies wearing a different coat. Now the consequence that matters. If the only rules are those the texts state, the law does not cover everything; it covers a bounded field with a very large silence around it. Ibn Ḥazm closes the silence with a default: what no text forbids is permitted. The law is complete, on his account, not because it contains a rule for every act but because it contains a residual clause. Literalism therefore does not maximise the law's reach — it minimises it, and hands the remainder to whoever is in a position to act. A ruler facing a Ẓāhirī jurist confronts a short list of things he may not do and an enormous unregulated field in which nothing he does is unlawful. Taken by itself, the method is congenial to executive discretion, not hostile to it. The derivation reading has the sign wrong. The step the method cannot supply Content-fixity concerns how a text is to be read. The anti-legislative corollary concerns who may issue a text with legal force. To get from the first to the second one needs an additional premise about the office itself: that the imamate — the headship of the community,