Since all the original inventors of protestantism were Catholic (as were all the early protestant laity), and protestantism came from Catholicism, one would suppose that we would have a fair amount of doctrine in common.
Of course, there’s no such thing as “protestant doctrine,” but I’m thinking of doctrines held in common by Catholics and ALL the “significant” protestant faiths. I’m not considering the doctrines of various non-denominational churches or oddball fringe groups. Admittedly, this is a vague definition.
I wouldn’t consider marriage an example of such a doctrine, because it’s not distinctly Christian. Nor would I consider water Baptism such a doctrine, because the amount of common understanding is very small and superficial.
I could think of only a few doctrines that we have in common with our “mainline” separated brethren, namely:
*]We believe that Jesus is the Son of God
*]We believe in a Triune God (Father, Son, Holy Spirit)
*]We believe in an afterlife / Heaven
and that’s all I could come up with.
Can anyone add to this list?