In the article I assert the societal dimension of Islam based on the duality of an Islamic worldview, based on the notion of tewhid, whose foundation is in Islamic law. One component of Islamic law is Islamic economic thought, irrevocably bounded within the Qu’ranic postulates of ethical conduct, founded on a logic contrary to global capitalism, as Max Weber also pointed out. Islamic banking is an expression of contemporary Islamic business ethics, regarded as a conjunction of the financial sector and shari'a-based principles.