Given his fans tend to suffer from severe tunnel vision this will get downvoted to hell, but for others with a more open mind Marx was a Jack of all trades and Master of none. He wrote obsessively and like scripture you can find whatever you're looking for in his purple prose. As one intellectual biographer noted: It is difficult to avoid the impression that he often wrote whatever came into his mind, and then forgot about it as he moved on to other matters. Not many know that he wrote a novel and about 1000 pages on Mathematics--no mean feat as that type of writing can be incredibly dense. He also wrote hundreds, if not thousands, of pages on other fields such as History, Economics, Sociology, Journalism, Anthropology, Politics (all aspects, practical and theoretical and in countries ranging from US to Russia--and most in between), Philosophy, Classics, Literary Theory, etc., etc. A lifelong passion for poetry meant he was never loath to fire off a few lines when the urge hit him. No great surprise there given the fact that he spent huge amounts of time every year re-reading Aeschylus, Goethe, and Shakespeare--in the original language, i.e. Greek, German, and English--and quite a few leading lights of Western literary canon besides going back to Homer. Not to mention learning new languages such as Russian which he picked up in his last decade to add to Latin, Greek, German, French (he was fluent in last 4 by the time he got his PhD in Classics, if not in gymnasium, i.e. High School), English, and possibly Hebrew. Some have claimed he had decent reading proficiency in all Romance languages, and there are accounts of his reading Romanian newspapers. Truly, someone who makes Leibniz and da Vinci look like pedantic specialists (Marx modestly compared himself with Newton and Engels compared him with Darwin). Either that's true or I won't spell it out ;)
