While there are some systematic theology works that come from outside the Reformed tradition (Tillich's Systematic Theology and the Summa Theologica come to mind), I've also observed that the majority of systematic theology works that I've seen are by Reformed authors. The Reformed tradition specializes in thorough, careful, analytical study, and I think this mindset is a natural fit for the creation of systematic theologies.
I wonder if that explains it? I seems like it ought to.
Your comment brought to mind the words in Ecclesiastes
And since Ecclesiastes was very wise, he taught the people, and he described what he had accomplished. And while searching, he composed many parables. He sought useful words, and he wrote most righteous words, which were full of truth. The words of the wise are like a goad, and like nails deeply fastened, which, through the counsel of teachers, are set forth by one pastor. You should require no more than this, my son. For there is no end to the making of many books. And excessive study is an affliction to the flesh. Let us all listen together to the end of the discourse. Fear God, and observe his commandments. This is everything for man. And so, for all that is done and for each error, God will bring judgment: whether it was good or evil.
Ecclesiastes 12:9-14
Haydock's annotated bible says only a little on the passage, what it says is shown below (slightly modified to conform to the words in the quote from Ecclesiastes above and shown in
bold).
like nails deeply fastened [in The ground], to keep a tent in its proper place. He seemed before to have placed the wise on the same level with fools, chap. 6:8, 11., and 7:1 (Calmet) ---
pastor. God, or Solomon. The Jews explain it of Moses, and his successors, who taught the people.
what came to mind was especially the words that say, "You should require no more than this, my son. For there is no end to the making of many books. And excessive study is an affliction to the flesh."
But they do not apply to systematic theology books. Yet it must be tiring work to gather so much data from scripture and write a book of 1,200 pages or more to organise the data into topics and doctrinal divisions. One cannot help but admire the industry of the writers.

Reactions: Yekcidmij