>>2 I read the wikipedia article on dialectic materialism since you mentioned different authors interpret it differently; I've not read many of these authors. To my eyes it seems that either the authors or the editors of wikipedia are conflating historical materialism and dialectic materialism. To me historical materialism is a specific result of appling dialectic materialism to Hegelianism on the one hand, and Classic Economics on the other. I don't really want to explain this however.