Internationalism No. 85, March 2026 Page 1 In his essay on the evolutionary process that led to Homo Sapiens , we saw how Friedrich Engels also links language to the chain of causes that, over hundreds of thousands of years, determined the evolution of the brain: upright posture, the hand, and labour . "Mastery over nature began with the development of the hand, with labour, and widened man's horizon at every new advance. He was continually discovering new, hitherto unknown properties in natural objects. On the other hand, the development of labour necessarily helped to bring the members of society closer together by increasing cases of mutual support and joint activity, and by making clear the advantage of this joint activity to each individual. In short, men in the making arrived at the point where they had something to say to each other ". Therefore: "First labour, after it and then with...