The critique of various views of reformist ideology holds a significant place in the texts of Karl Marx and Friedrich Engels. This is absolutely natural.

One of the greatest achievements of human thought was the development of the materialist conception of history by Marx and Engels. They were the first to demonstrate the inevitability and necessity of social revolutions, revealed the objective laws that cause them, and scientifically established the historical role of the working class in the capitalist era as a force that would bring about the further progressive development of society.

(. . .) [Excerpt from the text of the preface]