Medieval thought cast Islam variously as heresy, schism, and third revealed law

Evidence

Thus Islam was conceived in many contexts, not only as heresy, but as a schism belonging with the Eastern Churches, as part of a providential scheme of progressive error developing after the Christian revelation, as constituting the third Jaw, that is, with Judaism and Christianity, the third of revealed religions, and as one in a wide sequence of all the religions of the world. These different approaches often mingled. — Norman Daniel, Islam and the West, 1067

Categorization

Category: Definitional Content

  • DEFINE: Shows how the medieval taxonomy of Islam was multi-stranded — heresy, schism, third law — rather than a single classification.