Ijtihad: The Obligation and the Conditions

One of the most consequential arguments in I'lam al-Muwaqqi'in is Ibn al-Qayyim's sustained defense of ijtihad: the exercise of independent legal judgment by a qualified scholar. His position is that the qualified scholar who encounters a question has an obligation, not merely a permission, to exercise independent judgment rather than mechanically defaulting to the position of an earlier jurist. This obligation arises from the very structure of Islamic law: Allah sent the Prophet with a complete guidance for all times and places, and that guidance must be accessible to every generation through the effort of scholars who apply it freshly to the circumstances they face. A legal system in which no one is permitted to think for himself quickly becomes a system in which the law cannot respond to the needs of the people it was sent to serve.

Ibn al-Qayyim distinguishes carefully among different levels of scholarly qualification. The absolute mujtahid (mujtahid mutlaq) is the scholar who has mastered all the relevant disciplines and can derive rulings directly from the primary sources without being bound to any particular school's method. Below this level are the mujtahid within a school (mujtahid fi al-madhab), who exercises judgment within the framework of an established legal methodology, and the scholar qualified to select among positions within a school (mujtahid fi al-masa'il). Ibn al-Qayyim's critique of taqlid (blind imitation) is calibrated: he is not demanding that every Muslim become a mujtahid, but he insists that at each level of qualification, the scholar must exercise the judgment that level permits rather than abdicating it entirely.

The doctrine that the gates of ijtihad are permanently closed drew particular criticism from Ibn al-Qayyim. He found no Quranic, prophetic, or scholarly basis for the claim that independent legal reasoning was possible in the early generations but became impermissible or impossible later. On the contrary, he argued that such a doctrine contradicts the nature of the Shariah itself. The law was revealed for all humanity until the Day of Judgment, and new situations that the early jurists never encountered will continue to arise. Closing the door of ijtihad means leaving those new situations either without a ruling or with a ruling derived by forced analogy from ancient cases that may bear no genuine resemblance to them. Both outcomes represent a failure to serve the law's own objectives.

At the same time, Ibn al-Qayyim issues an equally sharp warning against the opposite error: reckless independent judgment by those who lack the qualifications for it. The person who issues rulings on the basis of superficial reading, personal inclination, or the desire to appear innovative is not exercising ijtihad; he is corrupting the law. The true mujtahid approaches the sources with fear of Allah, awareness of the gravity of his responsibility, and genuine mastery of the disciplines that legal reasoning requires. Ibn al-Qayyim holds both dangers in view simultaneously: the danger of a legal culture so closed that it can no longer address new realities, and the danger of a legal culture so permissive that anyone with a bold opinion can claim the status of a mujtahid. The solution is not to choose one danger over the other but to maintain rigorous standards while keeping the door of qualified scholarship genuinely open.