In London, Marx continued his agitation and literary work uninterruptedly—the former reaching its climax in the foundation of the International, in 1864; the latter in the appearance of his most important work, “Das Kapital” (“Capital”), in 1867.[173] It is a development and continuation of his “Zur Kritik der politischen Oekonomie”—“A Critique of Political Economy”—published in 1859. Marx intended, in “Das Kapital,” to present a complete system of political economy in three volumes, but had published only the first, “On the Process of Capital Production,” at the time of his death, March 14, 1883. The delay was due, it is said, to the extraordinary thoroughness with which he worked. He had, however, practically completed the second volume and had the third volume well under way before his decease. These two volumes, treating of the “Circulation of Capital” and “The Forms of the Entire Process and the History of the Theory,” will be brought out by his friend, Friedrich Engels. It is further stated that Marx had prepared a third and improved edition of the first volume, which is now in press.

Marx’s book, “Capital,” has been called the Bible of the social democrats, and it deserves the name. It defends their doctrines with acuteness of understanding and profundity of learning, and certainly ranks among the ablest politico-economic treatises ever written. I should place it on a par with Ricardo’s “Principles of Political Economy and Taxation.” Much has been said against its style. I think it, at least, equal to Ricardo’s. It is difficult reading, not because it is poorly written, but because it is deep. Any one, however, who has had some training in political economy, and is ordinarily bright, ought not to find its difficulty insurmountable.

Marx lived a quiet life in London, directing from that point the movements of the International, corresponding for the New York Tribune for a time, besides writing his books and pamphlets, and enjoying the society of his friends. His family life was a happy one. His wife was Jenni von Westphalen, daughter of the Prussian minister of the same name, who belonged to the celebrated reactionary ministry of which Von Manteuffel was president. He had four children, of whom two have already been mentioned as wives of well-known French socialists. The death of a son in early life was a severe blow to him, and he never recovered from the death of his wife, in 1881.

About the ability of Marx there is unanimity of opinion. The philosopher Professor Friedrich A. Lange regarded him as one of the ablest political economists that ever lived. So conservative a man as Professor Knies, of Heidelberg, has often spoken in high terms of his talents and acquisitions; and the well-known Cologne Gazette used these words in an obituary notice:[174] “He exercised, perhaps, a more lasting influence on the inner politics of civilized states than any one of his contemporaries. Political economy, especially in Germany, knows no writer who has influenced both masses and scholars in a more decided, thoroughgoing manner than Karl Marx.... He was one of the sharpest thinkers and readiest dialecticians ever possessed by economic science.... His ‘Capital’ is classical and indispensable for every one who wishes to concern himself earnestly with social and economic science.”

Immediately after the death of Marx, meetings were held in all parts of the United States and elsewhere, as far as the laws would allow it, to do honor to his memory. One characteristic feature of these meetings was the vow which was taken in all to spread the works and to disseminate the ideas of their departed leader. At the mass-meeting in the Cooper Institute, in New York city, undoubtedly the largest one held, the following resolutions were read and adopted:

“In common with the workers and the disinherited, with the true friends of liberty of all countries, we deplore the death of our great thinker and champion, Karl Marx, as a grievous and irreparable loss to the cause of labor and freedom.

“We pledge ourselves to keep his name and his works ever in remembrance, and to do our utmost for the dissemination of the ideas given by him to the world.

“We promise, in honor of the memory of our great departed, to dedicate our lives to the cause of which he was a pioneer—the struggle in which he left so noble a record—and never, at any moment, to forget his great appeal, ‘Workmen of the world, unite!’”

Similar resolutions were adopted at the other meetings, in Baltimore, Chicago, Cleveland, etc.

Marx’s followers boast particularly of two discoveries which he made—viz., the correct theory of the development of history and his doctrine of value. While it is not true that these were, by any means, entirely original with him, no one would dispute that his presentation is worked out in an original and remarkable manner.