From our joint preface to the German edition of 1872, I quote the following:
"However much that state of things may have altered during the last twenty-five years, the general principles laid down in the Manifesto are, on the whole, as correct today as ever. Here and there, some detail might be improved. The practical application of the principles will depend, as the Manifesto itself states, everywhere and at all times, on the historical conditions for the time being existing, and, for that reason, no special stress is laid on the revolutionary measures proposed at the end of Section II. That passage would, in many respects, be very differently worded today. In view of the gigantic strides of Modern Industry since 1848, and of the accompanying improved and extended organization of the working class, in view of the practical experience gained, first in the February Revolution, and then, still more, in the Paris Commune, where the proletariat for the first time held political power for two whole months,this programme has in some details been antiquated.One thing especially was proved by the Commune,viz., that "the working class cannot simply lay hold of readymade state machinery, and wield it for its own purposes." (See The Civil War in France:Address of the General Council of the International Working Men's Association 1871, where this point is further developed.) Further, it is self-evident that the criticism of socialist literature is deficient in relation to the present time, because it comes down only to 1847; also that the remarks on the relation of the Communists to the various opposition parties (Section IV), although, in principle still correct, yet in practice are antiquated, because the political situation has been entirely changed, and the progress of history has swept from off the Earth the greater portion of the political parties there enumerated.