This book reminds me of the aphorism 'The more things change, the more they remain the same". Sinclair's theses can be startingly current in many instances (usually by substituting terms like 'fundamentalist' for 'catholic', for example).
Mr. Sinclair does like to go on, however. Some parts of the work are almost totally opaque to the modern reader, but his socialist aims remain as transparent as they were in The Jungle.
All in all, a very worthwhile read. When Sinclair is good, he is very very good, and the slow parts are worthwhile to this end