As of 2024[update], approximately 625 million identify as Protestants.[13][16][j]
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^"Methodist Beliefs: In what ways are Lutherans different from United Methodists?". Wisconsin Evangelical Lutheran Synod. 2014. Archived from the original on 22 May 2014. Retrieved 22 May 2014. The United Methodists see Scripture as the primary source and criterion for Christian doctrine, emphasizing the importance of tradition, experience, and reason for Christian doctrine. Lutherans teach that the Bible is the sole source for Christian doctrine. The truths of Scripture do not need to be authenticated by tradition, human experience, or reason. Scripture is self authenticating and is true in and of itself.
^Löffler, K. (1910), Pope Leo XArchived 1 May 2012 at the Wayback Machine, The Catholic Encyclopedia, New York: Robert Appleton Company, "The immediate cause was bound up with the odious greed for money displayed by the Roman Curia, and shows how far short all efforts at reform had hitherto fallen...Abuses occurred during the preaching of the Indulgence. The money contributions, a mere accessory, were frequently the chief object, and the "Indulgences for the Dead" became a vehicle of inadmissible teachings...(The pope) gave himself up unrestrainedly to his pleasures and failed to grasp fully the duties of his high office."
^Kuyper, Abraham (1899). Calvinism. Primedia E-launch LLC. ISBN978-1622090457. Archived from the original on 10 June 2022. Retrieved 27 June 2015 – via Google Books.
^Heussi, Karl (1956). Kompendium der Kirchengeschichte, 11., Tübingen (Germany), pp. 317–319, 325–326
^Cite error: The named reference Remensnyder1893 was invoked but never defined (see the help page).
^Cite error: The named reference Frey1918 was invoked but never defined (see the help page).
^Hägglund, Bengt (2007). Teologins Historia [History of Theology] (in German). Translated by Gene J. Lund (Fourth Revised ed.). Saint Louis: Concordia Publishing House.
^World Council of Churches: Evangelical churchesArchived 7 January 2015 at the Wayback Machine: "Evangelical churches have grown exponentially in the second half of the 20th century and continue to show great vitality, especially in the global South. This resurgence may in part be explained by the phenomenal growth of Pentecostalism and the emergence of the charismatic movement, which are closely associated with evangelicalism. However, there can be no doubt that the evangelical tradition "per se" has become one of the major components of world Christianity. Evangelicals also constitute sizable minorities in the traditional Protestant and Anglican churches. In regions like Africa and Latin America, the boundaries between "evangelical" and "mainline" are rapidly changing and giving way to new ecclesial realities."
^Berger, Peter L. (2005). "Religion and Global Civil Society". In Juergensmeyer, Mark (ed.). Religion in Global Civil Society. Oxford University Press. ISBN978-0198040699. Archived from the original on 19 March 2013. Retrieved 8 January 2016 – via Google Books.