I think we all have to reexamine our ideas and beliefs as we grow. I think this book highlights the notion that we can't necessarily judge the decisions and actions of our predecessors from the view point of today. Having said that, there are certain moral truths that one can expect of all ages. No killing other people for example.
I thought the underlying concept of a grand conspiracy to be a little over the top (ie JFK, RFK and MLK). Friends and family in New Orleans have long expressed the view that the drug problem in town was exacerbated by the wealthy as a way to do a land grab. In fact, just yesterday, I heard on NPR that the city still has not built affordable housing 10 years after Katrina. So that part to me was perfectly believable.
I am interested to know what happens to Doc in subsequent books. Although the length was intimidating, I think the first volume was a very, very Southern book painful, in a way, like tearing a band aid of off old wounds.