Paraphase the below info:
The book is long, and in some ways, too detailed. Morgan delights in the telling particular, and at times one wishes he would not linger on some specifics. But this has a purpose.
He wants to show the imperceptible and surreptitious mechanisms by which a society acquires its ugly and immoral traits until they become so natural as to be invisible. Step by step, event by event, law by law a construction emerges that would have horrified its founders.
Yet, at the time, it seemed the logical, and the right thing to do.