“The entirety of Marxism from top to bottom was established by means of the dialectical materialist method. In literally any work of Marx and Engels it is therefore both possible and necessary to study the logic of their thinking and the theory of knowledge which they consciously employed – dialectics. This must be studied not only in their writings, but in the real logic of the political struggle which they conducted throughout their entire lives. For dialectics is the logic not only of research, and not only of the unity of scientific works; it is also a logic of real causes which comes to life and enters into battle, finding realisation in whatever are the truly real causes changing the face of the surrounding world.”