How did the development of universities in medieval europe strengthen the church and unify society?

Universities grew up around cathedrals and courses of study helped educate clergy.

Explanation:

Charlemagne recognized that his nation required a body of taught bodies if it was to endure, and he directed to the Church as the only root of such study. He originated a decretal every cathedral and monastery was to build a school to accommodate a free learning for every child who had the ability and the determination to pursue a particular program of education. Since the purpose was to produce a large body of skilled priests upon which both the nation and local districts could draw for administration, girls were neglected. Charlemagne expired, civil wars burst out, and the incursions of the Magyars, Vikings, and Saracens started before his program could be carried out. Some institutions had been founded, however, and stayed into the severest of the times that happened. Their aim was to encourage priests, and their curriculum was intended to do that and little more.