Interrogating the development and conceptual framework of economic thought in the Islamic tradition pertaining to ethical, philosophical, and theological ideas, this book provides a critique of modern Islamic economics as a hybrid economic system. From the outset, Sami Al-Daghistani is concerned with the polyvalent methodology of studying the phenomenon of Islamic economic thought as a human science in that it nurtures a complex plentitude of meanings and interpretations associated with the moral self. By studying legal scholars, theologians, and Sufis in the classical period, Al-Daghistani looks at economic thought in the context of Shari'a's moral law. Alongside critiquing modern developments of Islamic economics, he puts forward an idea for a plural epistemology of Islam's moral economy, which advocates for a multifaceted hermeneutical reading of the subject in light of a moral law, embedded in a particular cosmology of human relationality, metaphysical intelligibility, and economic subjectivity.