Religious Law in the Courts of Iran and Nigeria

In Nigeria, judicial power is split by geography. Twelve northern states, with large Muslim populations, operate Sharia courts that handle matters like marriage, inheritance, and some criminal offenses under Islamic law. Southern states, with more Christian and mixed populations, rely only on the federal and state secular court structure. Both systems sit under the same federal constitution, so a Nigerian's legal exposure depends on which state they live in. This is a parallel legal system: two tracks running side by side rather than one replacing the other.

Iran works differently. There is no separate religious court running alongside a secular one. Instead, religious law is built into the one judiciary that exists. Judges are required to train in fiqh, Islamic jurisprudence, so religious reasoning is not an alternative to law but the substance of it. The Supreme Leader appoints the head of the judiciary, who in turn shapes appointments down the chain, so rulings answer to religious authority at the top rather than to an elected legislature. A case moving through this system, from a lower revolutionary or public court up through appeals to the Supreme Court, stays inside a single religiously grounded structure the whole way.

Both cases show the same underlying lesson: courts are never neutral wiring. Nigeria's split tracks map onto its federalism and its religious cleavage between north and south, so judicial structure becomes a release valve for diversity. Iran's fused structure maps onto its theocratic design, where religious authority runs through every institution rather than being confined to courts alone.