Answer: The main idea is during the middle ages the people of Europe began to unite due to them having a common ground of religion.
1. When Europe fell apart after the fall of Rome in ancient Europe, the Pope was looked to for reassurance and leadership.
2. Christianity held the countries and continent together, and since religion was a powerful bond, the Catholic Church, and especially the pope had great power.
3.Whoever held the office responsible not only for the spiritual well-being of the people, but also for issuing bulls, writings on moral and spiritual teachings or church policy, for the rest of Europe to live by.
Explanation: Just read the passage and you'll see i'm right.