IBN HAZM (Abu Mohammed `Ali ibn Ahmad ibn Hazm) Moslem theologian, was born in a suburb of Cor dova. He studied history, law and theology, and became a vizier as his father had been before him, but was deposed for heresy, and spent the rest of his life quietly in the country. In legal matters he belonged first to the Shafi'ite school, but came to adopt the views of the Zahirites, who admitted only the external sense of the Koran and tradition, disallowing the use of analogy (Qiyos) and Taqlid (appeal to the authority of an imam), and objecting altogether to the use of individual opinion (Ra`y). Ibn Hazm extended the application of these principles from the study of law to that of dogmatic theology. His chief work is the Kitdb ul-Milal wan-Nihal, or "Book of Sects" (published in Cairo, 1899).