"In the light of the evidence it is hard to believe that most crusaders were motivated by crude materialism. Given their knowledge and expectations and the economic climate in which they lived, the disposal of assets to invest in the fairly remote possibility of settlement in the East would have been a stupid gamble. It makes much more sense to suppose, in so far as one can generalize about them, that they were moved by an idealism which must have inspired not only them but their families. Parents, brothers and sisters, wives and children had to face a long absence and must have worried about them: in 1098 Countess Ida of Boulogne made an endowment to the abbey of St Bertin 'for the safety of her sons, Godfrey and Baldwin, who have gone to Jerusalem'. And they and more distant relatives – cousins, uncles and nephews – were prepared to endow them out of the patrimonial lands. I have already stressed that no one can treat the phenomenal growth of monasticism in this period without taking into account not only those who entered the communities to be professed, but also the lay men and women who were prepared to endow new religious houses with lands and rents. The same is true of the crusading movement. Behind many crusaders stood a large body of men and women who were prepared to sacrifice interest to help them go. It is hard to avoid concluding that they were fired by the opportunity presented to a relative not only of making a penitential pilgrimage to Jerusalem but also of fighting in a holy cause. For almost a century great lords, castellans and knights had been subjected to abuse by the Church. Wilting under the torrent of invective and responding to the attempts of churchmen to reform their way of life in terms they could understand, they had become perceptibly more pious. Now they were presented by a pope who knew them intimately with the chance of performing a meritorious act which exactly fitted their upbringing and devotional needs and they seized it eagerly.But they responded, of course, in their own way. They were not theologians and were bound to react in ways consonant with their own ideas of right and wrong, ideas that did not always respond to those of senior churchmen. The emphasis that Urban had put on charity – love of Christian brothers under the heel of Islam, love of Christ whose land was subject to the Muslim yoke – could not but arouse in their minds analogies with their own kin and their own lords' patrimonies, and remind them of their obligations to avenge injuries to their relatives and lords. And that put the crusade on the level of a vendetta. Their leaders, writing to Urban in September 1098, informed him that 'The Turks, who inflicted much dishonour on Our Lord Jesus Christ, have been taken and killed and we Jerusalemites have avenged the injury to the supreme God Jesus Christ.'"