What is the main idea and 3 details that support the main idea of this passage. If its blurry read here...
"During the Middle Ages, the people of Europe began to unite due to common ground, most nobalty religion. Christianity held the countries and continent together, and since religion was a powerful bond, the Catholic Church, and especially the pope had great power. He was viewed as God's representative on Earth. This position made 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. When Europe fell apart after the fall of Rome in ancient Europe, the Pope was looked to for reassurance and leadership. The pope's power also lent them to political stances, and thus significant wealth. Many popes built palaces to live in, wore the finest clothes, and ate and drank choice foods and wine. Later in Feudal European history, the pope often disagreed with kings of various countries, due to moral or spiritual issues. If the king refused to do what the pope saw as right, the pope could excommunicate him, meaning the king was removed from the church. Many Christians feared this verdict because it implied that the ruler wouldn't go to heaven at the end of his life."

Aunitary state is a form of state where power is concentrated and there is a single center of power that extends its actions throughout the territory of the respective state. this, through its agents and local authorities, delegates of that same central power, and in its majority; it can count on a single legislating apparatus; except for certain exceptions, which legislate for the entire country; a judicial power, which applies the current law to the entire territory of the state and within which a supreme court of justice is established, which has jurisdiction at the national level; a single executive power, that is conformed by all the governors (president, governors, mayors, etc.); and a single political constitution, which governs all the territory and to which all the authorities and inhabitants of the state are subject.a confederation (from the latin: confœderatĭo) consists of the union of states that retain their sovereignty and are governed by certain common laws. initially there was talk of "confederation" in the case of alliances, for this reason the word "confederation" is still used in non-governmental civil society institutions. for this reason, the term confederation is also used to describe any type of organization that combines the authority derived from other semi-autonomous entities. in this case, sports confederations can be cited as some examples. however, the word confederation takes much more relevance when it comes to some permanent alliance of states or some association or association of states.characteristics of a federal government system

  a) written constitution. also known as magna carta and a necessity of the democracies that form federations to regulate the principles by which the government will be governed, because if they had to act without a body of specific laws would produce confrontations.

b) territorial division. federalism is constituted by the division of powers on the geographical basis of each territory.

c) decentralization. in a federal system there is both a central government and units of government lower than the central one, each making decisions regarding the provision of certain public services in their respective geographical jurisdictions.

d) supreme court of justice. to counteract the rigidity of the written constitution, judicial action is required to interpret said constitution and necessary changes can be made.