The classes and races too weak too master the new conditions of life, must give way. They must perish in the Revolutionary Holocaust — Karl Marx
Karl Marx and Engels were the ancestor of the modern political genocide.
In the January and February 1849 issues of his journal ‘Neue Rheinische Zeitung’, Karl Marx published articles calling for the extermination of whole races in Europe. These articles were included in a book of the teachings of Marx, Engels and Lenin published in Germany during 1902 and again in 1913. It is most likely that Engels wrote them. This socialist programme considered the Slav nations to be ‘counter-revolutionary’. The Germans, Poles and Magyars (Hungarians) were considered to be ‘the bearers of progress’. The rest must go:
"The chief mission of all other races and peoples, large and small, is to perish in the revolutionary holocaust”.
It was explained that the Slavs had failed to pursue essential historic evolution, so were therefore counter-revolutionary. All European countries contain ‘left-overs of earlier inhabitants’, now rightly brought into subjugation by more advanced peoples. Amongst such ‘racial trash’ (Voekerabfall) were listed Scottish Highlanders, Bretons, Basques, South Slavs (Slovenes, Croats, Serbs) and Czechs.
“Until its complete extermination or loss of national status, this racial trash always becomes the most fanatical bearer there is of counter-revolution, and it remains that. That is because its entire existence is nothing more than a protest against a great historical revolution. … The next world war will cause not only reactionary classes and dynasties, but also entire reactionary peoples, to disappear from the earth. And that too is progress”.
As Marx and Engels aged, they took greater interest in Eugenics and Social Darwinism suggesting that progress was interpretable in racial terms.