Rogers’ opening description helps me to understand why so many post-mils are so in denial about present world conditions, but his description of dispensationalism is way off the mark today. Perhaps it reflects some of the earlier writers?
He seems unaware of the present “one new man” view of the flow from Hebraic worship through gentile Christinn worship to the one new man.
Of course dispensationalism is very alive and vibrant, changing as greater understanding of prophecies opens eyes. There probably isn’t one single volume currently that would describe it completely.
Alive and vibrant, or built on shifting sand? The theories change because the underlying foundation of dispensationalism, current events, keeps changing.