Papal attempts at a commercial boycott of the Muslims in the crusader period

Notwithstanding the many precedents for economic boycott before the crusader period, the first evidence of a Christian offensive other than on the battlefield appears only in the second half of the twelfth century, almost seventy years after the Council of Clermont. This paper aims to complement Moore's theory about the emergence of the Christian persecuting society with an additional case that, from a medieval Christian point of view, associates two of the Devil's main partners: first and foremost Muslims but also Christian merchants who profited from trading with them. It is the premise of this study that the many bans on trade with the Muslims in the crusader period-both in their essence and timing-and the reactions that they aroused reveal conflicting attitudes toward Muslims and Islam, thus contributing new perspectives for the study of the crusades.