Some of Al-Duwayhi's historical theories (e.g. of the perpetual orthodoxy of the Maronites) are controversial. His general account of Maronite history has been widely adopted to justify Maronite exceptionalism and later "Lebanism". However, it has been proven to contain major historical flaws and is now disregarded by serious historians (see Kamal Salibi's "A House of Many Mansions".