“Between 1863 and 1867 Marx had not only completed the first draft of the last two volumes of ‘Capital’, and made the first volume ready for the printer, but had also mastered the enormous work connected with the foundation and expansion of the International Workingmen’s Association. The result was the appearance of the first symptoms of that ill-heath which is to blame for the fact that Marx did not himself put the finishing touches to the second and third volumes” [F. Engels, 1894] [in Zelda K. Coates, The Life and Teachings of Friedrich Engels, 1945]