A genealogy of the relationship between Islam and knowledge focusing on the Muslim West and, in particular, Algeria explains the current chaos within Muslim societies. The West, on its side, has difficulties understanding a cultural tradition which differs from its own. Islam did develop an aptitude for knowledge that put into play ‘different intellectual modalities, among which were dialectic argument, intuition and controversy’. However, ‘the accession to knowledge is shown by assent’. A long tradition of debate and controversy drew to a close and was abandoned in favour of the exercise of authoritative and absolute power. Intellectual life in the region suffered notably from the successive departures of the elite, at the end of the Ottoman Empire, at the onset of the colonial period and upon independence. Colonialism founded a new system born of different traditions and entailed the breaking up of traditional scholastic institutions. After Independence, fewer and fewer interlocutors were capable of undertaking a reasoned critique of the West. ‘Mistrust with regard to the West’ translated into a ‘refusal even of controversy’. It is a vicious circle that can be broken only through a minimum of democracy.