Ok, I disagree with Calvinists on what I consider a secondary doctrine. I disagree with Catholics on several primary doctrines. Huge difference in my mind.Yet they have a very optimistic view of human nature! Contrast them to the Calvinist for example—these people at their very heart believe that humans are endlessly depraved (and there is some truth to that) but Catholics don’t start there... they start with Genesis 1:10. They get to original sin afterwards.