Interpretation and Its Reach

While the prohibition itself is unanimous, Muslims have long debated its precise scope, whether it forbids all bank interest or only exploitative excess, and the modern Islamic banking movement grew from the stricter reading. The rule expresses a broader ethic that wealth should arise from productive effort and shared venture rather than from money lent at a fixed return. It parallels historic prohibitions of usury in Jewish and Christian law, though Islam has retained and institutionalised the ban more comprehensively into contemporary economic practice.

The modern Islamic banking movement has a fairly precise institutional starting point: the Mit Ghamr Savings Bank, founded in Egypt in 1963 by the economist Ahmad al-Najjar, is generally credited as the first modern experiment in interest-free banking, operating on profit-and-loss sharing rather than fixed interest before political pressures closed it within a few years. The theoretical groundwork was laid alongside it by writers such as the Iraqi scholar Muhammad Baqir al-Sadr, whose 1961 work Iqtisaduna (Our Economics) argued for a distinctively Islamic economic system, and their combined efforts fed into the much larger Islamic banking industry that developed across the Gulf and South and Southeast Asia from the 1970s onward.