have you not heard of the russian and chinese revolutions or what am I missing here? Two of the largest nations in the world mobilised their masses, led them into war against the ruling class and won. They lead huge literacy and industrialization campaigns that allowed their nations to leapfrog most other nations and made them able to compete with europe and the us in terms of technological advancements. Their leaders, now famous worldwide, are thought leaders in dialectical materialism and how to apply it. As a more concrete example Marx successfully predicted the monopolisation of market segments for instance. Which was a wild prediction to make in the 19th century when every town had their own factories and competition among them was fierce.

Yes words have different meanings in different contexts. "Blockade" has a common meaning and a different meaning in graph theory. But if you used it in its graph theory meaning unbidden in an online discussion thread that wasn't already about graph theory, and without introducing the context of graph theory into the conversation first, then I would say you are using the word incorrectly.

You are free to do so of course, but there are quite a few people around who have read about imperialism and got the meaning behind the comment immediately, making an outright statement like "i mean contradiction in the diamat sense" seem superfluous to me.