Peace was, then as now, one of the world's needs.
Although the eighth, ninth and succeeding century were not without their brighter sides and were not those totally Dark Ages they have been represented by the enemies of the Church, nevertheless, seeds of evil passions, which in spite of her endeavors the Church had been unable completely to stifle, lingered in the hearts of those strong-limbed, strong-passioned Teutonic races which had succeeded to the tasks and responsibilities of pagan Rome.

Those races did not have Rome's organizing power.

By force, it is true, in a great measure, but force intelligently applied, but also by patience, by an instinct for justice and for order, Rome had welded her vast empire into a coherent whole.
Rome really, and effectively ruled.

She had authority, she had prestige, she was respected and feared, until the fatal day when, for her vices and tyranny, she began to be hated.

That day her fate was sealed.
The Teutonic races lacked the power of organization.