The basic reason we need “democracy”, regardless of form (Westminster style government technically answerable to the Queen, Republican style or whatever) is that we are fallen. That is, we can’t be trusted with unlimited power over our fellow man. This doesn’t mean that every man is so good and wise he or she deserves a role in government.
I remember discussing another issue with my old pastor. He had just stated that he “wondered if Protestants get to heaven” ( and he was Protestant) and that he thought God wasn’t as easy going about the division of the church as we were.
In the same discussion he mentioned that “if there is a ‘false prophet’”, he thought it was probably Martin Luther, quoting “Some of the things Luther said and did weren’t very Christian”.
Leaving those two items aside for a forum bun fight somewhere else, we moved on to the topic of, “Well, if that’s the case, why did God allow the Reformation to take place?”
His comments were along the lines that it hastened the development of democracy, and that Bible study was dragged out of the confines of medieval church allegorisation, and ultimately into Biblical criticism. This in turn led to the development of much greater intellectual freedom. It would have taken far longer, if ever, under the old centrally authoritan states of Catholic Europe.
The fact is that the Protestant world has largely led the Catholic world in these developments. The USA for example is still essentially Protestant in its heritage. Compare it’s historical development with that of Catholic Latin America, or Orthodox Russia.
But ultimately it boils down to the fact we can’t be trusted with absolute power. I’m not sure who penned the term, but “Power corrupts, and absolute power corrupts absolutely”. Which is probably why so many of the saints were never allowed to be in positions of power, but service. God’s Old Testament people, the Jews, were never allowed anything remotely resembling an empire, even at the peak of the kingdoms of David and Solomon.