The Ethiopian Orthodox Church is numerically the largest of the five non-Chalcedonian Eastern Churches the Coptic, the Ethiopian, the Syrian, the Indian, and the Armenian which are by the historian Adrian Fortescue called The Lesser Eastern Churches, but which others prefer to call The Oriental Orthodox Churches, to distinguish them from the Byzantine Orthodox Churches.These Churches in their description of Jesus Christ, God-Incarnate, do not use the controversial formula Two natures in one person, but adhere to the older formula One Incarnate nature of God the Word, and have therefore been accused of the heresy known as Monophysitism. Like the four other Churches in this group the Ethiopian Church believes in the full Divinity and the true Humanity of Jesus Christ and is, therefore, perfectly Orthodox in its christological teaching as is also confirmed by A. Wondmagegnehu and J. Motovu in their book The Ethiopian Orthodox Church.