https://www.humanreligions.info/tags/protestantism.html
Human Truth Foundation pages (4):
A List of Christian Denominations and Sects: 3.2. Protestantism (1517CE)
Social Identity as a Propagator of Religion: 2. Communal Identity and Rebellion
The Christian Dark Ages of Europe: 2.2. The Reformation: The Fragmentation of Christian Power from the 16th Century
Christianity: 4. Denominations