What are the primary doctrinal differences between Roman Catholicism, Lutheranism, and Calvinism?

Lutheranism has several sub-branches that are led by the actual bishops and priests who have a religious authority, in the tradition of the Roman Catholic Church. Calvinism, on the other hand, being a purer form of Protestantism, completely rejects the authority of the interpreters of God’s teachings, starting with the Pope’s.

Calvinism teaches the absolute sovereignty of God. The concept of sovereignty is of utmost importance. God accomplishes all things he has chosen to accomplish and never fails. This leaves very little for a man, since God knows better. For Lutherans, on the other hand, a concept of Sovereignty is not very important, similar to other abstract theological concepts. Martin Luther and his followers saw the primal point of theology in Jesus Christ being given to humanity in the form of Words and the Sacraments.

Roman Catholics teach that the Roman Catholic Church is the only true church, and that the pope is the supreme authority over the church, having received his authority by direct apostolic succession from Peter. Calvinists teach that there is no such thing as apostolic succession which hands such authority down from person to person, and that there is no single visible entity or church which may be indentified as "the true church."

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