the reformation started with three guys and one of them was martin luther...
It all started when the reformers like martin luther, john calvin, and henry VII argued with the Pope's authorities. and questioned the catholic's church ability to define Christian Practice. They started to fight about who had the right authority.
When the reformation started there were triggered wars and persecutions at the time. The catholic church gave forceful response to the protestants!
The key idea of the reformation group was a call to purify the church and a belief that the bible (not tradition),