If you are interested in the life and the story of the Presbyterian Church in America, you would do well to read this. It is 26 pages, and probably the best and most fair-minded analysis of the PCA, where it came from, and where it is.
At the very least, read from page 19 on.
I agree with Tim's historical analysis, and I am generally on board with this vision of each correcting the other. He says what I have tried to say for a long time, but not nearly as well.
And, I felt convicted.
And, I felt confused, because I feel like a meld of all 3 branches!