Although the subject is interesting and may explain the material, I found the writing to be for very low grade levels and tended to be too simplistic, considering the depth this subject requires. The author lumps much of the detail into broad theories with little scripture confirmation. The credentials of the author lead me to feel the little treatise this is, may not his best work. I would have preferred a 400 page detailed volume with firm, reasonable, arguments instead of 54 page booklet with few actual references of value and many foggy details