ABSTRACT
A certain number of experiences and political lessons emerge from a study of this part of the book. The imama system had been patiently built up, based on a constitution and on original Ibadhite codes, but it was not invulnerable. It did not exclude the risk of internal destabilisation, as first happened with the fall of the imama of al-Salt ibn Malek in the third century of the Hegira (AD ninth century) and then with the drift of the Ya=rubite State (1624-1741) and the fall of the imama system, ending in a crisis of national unity, the emergence of clan loyalties and a series of long and exhausting civil wars.
