It took three attempts over 30 years, but I finally started and finished The Poverty of Philosophy by Karl Marx (1847).
Marx is a demanding writer, and his scabrous style here can be confusing to the inattentive reader.
His nemesis here is Proudhon, a sanctimonious middle class tinkerer who wants to bring forth a peaceful society by elimination of contradictions. "Use only the positive aspects of every economic category," is his insight.
It does not take much effort to hear such sentiments echoed more recently than Proudhon's time.
Start the book, read it straight through without underlining anything. It takes about four hours. Then go back through to highlight Marx's illuminating lightning bolts.
14 January 2018
A few sections I highlighted:
….Up to now we have expounded only the dialectics of Hegel. We shall see later how M. Proudhon has succeeded in reducing it to the meanest proportions. Thus, for Hegel, all that has happened and is still happening is only just what is happening in his own mind. Thus the philosophy of history is nothing but the history of philosophy, of his own philosophy. There is no longer a "history according to the order in time," there is only "the sequence of ideas in the understanding." He thinks he is constructing the world by the movement of thought, whereas he is merely reconstructing systematically and classifying by the absolute method of thoughts which are in the minds of all.
Economic categories are only the theoretical expressions, the abstractions of the social relations of production, M. Proudhon, holding this upside down like a true philosopher, sees in actual relations nothing but the incarnation of the principles, of these categories, which were slumbering – so M. Proudhon the philosopher tells us – in the bosom of the "impersonal reason of humanity."
M. Proudhon the economist understands very well that men make cloth, linen, or silk materials in definite relations of production. But what he has not understood is that these definite social relations are just as much produced by men as linen, flax, etc. Social relations are closely bound up with productive forces. In acquiring new productive forces men change their mode of production; and in changing their mode of production, in changing the way of earning their living, they change all their social relations. The hand-mill gives you society with the feudal lord; the steam-mill, society with the industrial capitalist.
The same men who establish their social relations in conformity with the material productivity, produce also principles, ideas, and categories, in conformity with their social relations.
Thus the ideas, these categories, are as little eternal as the relations they express. They are historical and transitory products.
There is a continual movement of growth in productive forces, of destruction in social relations, of formation in ideas; the only immutable thing is the abstraction of movement – mors immortalis….
….....Just as the economists are the scientific representatives of the bourgeois class, so the Socialists and Communists are the theoreticians of the proletarian class. So long as the proletariat is not yet sufficiently developed to constitute itself as a class, and consequently so long as the struggle itself of the proletariat with the bourgeoisie has not yet assumed a political character, and the productive forces are not yet sufficiently developed in the bosom of the bourgeoisie itself to enable us to catch a glimpse of the material conditions necessary for the emancipation of the proletariat and for the formation of a new society, these theoreticians are merely utopians who, to meet the wants of the oppressed classes, improvise systems and go in search of a regenerating science. But in the measure that history moves forward, and with it the struggle of the proletariat assumes clearer outlines, they no longer need to seek science in their minds; they have only to take note of what is happening before their eyes and to become its mouthpiece. So long as they look for science and merely make systems, so long as they are at the beginning of the struggle, they see in poverty nothing but poverty, without seeing in it the revolutionary, subversive side, which will overthrow the old society. From this moment, science, which is a product of the historical movement, has associated itself consciously with it, has ceased to be doctrinaire and has become revolutionary.
Let us return to M. Proudhon.
Every economic relation has a good and a bad side; it is the one point on which M. Proudhon does not give himself the lie. He sees the good side expounded by the economists; the bad side he sees denounced by the Socialists. He borrows from the economists the necessity of eternal relations; he borrows from the Socialists the illusion of seeing in poverty nothing but poverty. He is in agreement with both in wanting to fall back upon the authority of science. Science for him reduces itself to the slender proportions of a scientific formula; he is the man in search of formulas. Thus it is that M. Proudhon flatters himself on having given a criticism of both political economy and communism: he is beneath them both. Beneath the economists, since, as a philosopher who has at his elbow a magic formula, he thought he could dispense with going into purely economic details; beneath the socialists, because he has neither courage enough nor insight enough to rise, be it even speculatively, above the bourgeois horizon.
He wants to be the synthesis – he is a composite error.
He wants to soar as the man of science above the bourgeois and proletarians; he is merely the petty bourgeois, continually tossed back and forth between capital and labour, political economy and communism….
....Of all the towns in England, Bolton is the one in which the radicalism is the most developed. The Bolton workers are known to be the most revolutionary of all. At the time of the great agitation in England for the abolition of the Corn Laws, the English manufacturers thought that they could cope with the landowners only by thrusting the workers to the fore. But as the interests of the workers were no less opposed to those of the manufacturers than the interests of the manufacturers were to those of the landowners, it was natural that the manufacturers should fare badly in the workers' meetings. What did the manufacturers do? To save appearances they organized meetings composed, to a large extent, of foremen, of the small number of workers who were devoted to them, and of the real friends of trade. When later on the genuine workers tried, as in Bolton and Manchester, to take part in these sham demonstrations, in order to protest against them, they were forbidden admittance on the ground that it was a ticket meeting – a meeting to which only persons with entrance cards were admitted. Yet the posters placarded on the walls had announced public meetings. Every time one of these meetings was held, the manufacturers' newspapers gave a pompous and detailed account of the speeches made. It goes without saying that it was the foremen who made these speeches. The London papers reproduced them word for word. M. Proudhon has the misfortune to take foremen for ordinary workers, and enjoins them not to cross the Channel.
If in 1844 and 1845 strikes drew less attention than before, it was because 1844 and 1845 were the first two years of prosperity that British industry had had since 1837. Nevertheless none of the trades unions had been dissolved.
Now let us listen to the foremen of Bolton. According to them manufacturers have no command over wages because they have no command over the price of products, and they have no command over the price of products because they have no command over the world market. For this reason, they wish it to be understood that combinations should not be formed to extort an increase in wages from the masters. M. Proudhon, on the contrary, forbids combinations for fear they should be followed by a rise in wages which would bring with it a general dearth. We have no need to say that on one point there is an entente cordiale between the foremen and M. Proudhon: that a rise in wages is equivalent to a rise in the price of products.
But is the fear of a dearth the true cause of M. Proudhon's rancour? No. Quite simple, he is annoyed with the Bolton foremen because they determine value by supply and demand and hardly take any account of constituted value, of value which has passed into the state of constitution, of the constitution of value, including permanent exchangeability and all the other proportionalities of relations and relations of proportionality, with Providence at their side.
"A workers' strike is illegal, and it is not only the Penal Code that says so, it is the economic system, the necessity of the established order....
"That each worker individually should dispose freely over his person and his hands, this can be tolerated, but that workers should undertake by combination to do violence to monopoly, is something society cannot permit."
(Vol. I, pp. 334 and 335)
M. Proudhon wants to pass off an article of the Penal Code as a necessary and general result of bourgeois relations of production.
In England, combination is authorized by an Act of Parliament, and it is the economic system which has forced Parliament to grant this legal authorization. In 1825, when, under the Minister Huskisson, Parliament had to modify the law in order to bring it more and more into line with the conditions resulting from free competition, it had of necessity to abolish all laws forbidding combinations of workers. The more modern industry and competition develop, the more elements there are which call forth and strengthen combination, and as soon as combination becomes an economic fact, daily gaining in solidity, it is bound before long to become a legal fact.
Thus the article of the Penal Code proves at the most that modern industry and competition were not yet well developed under the Constituent Assembly and under the Empire. 
Economists and socialists [*1] are in agreement on one point: the condemnation of combination. Only they have different motives for their act of condemnation.
The economists say to workers:
Do not combine. By combination you hinder the regular progress of industry, you prevent manufacturers from carrying out their orders, you disturb trade and you precipitate the invasion of machines which, by rendering your labour in part useless, force you to accept a still lower wage. Besides, whatever you do, your wages will always be determined by the relation of hands demanded to hands supplied, and it is an effort as ridiculous as it is dangerous for you to revolt against the eternal laws of political economy.
The socialists say to the workers:
Do not combine, because what will you gain by it anyway? A rise in wages? The economists will prove to you quite clearly that the few ha'pence you may gain by it for a few moments if you succeed will be followed by a permanent fall. Skilled calculators will prove to you that it would take you years merely to recover, through the increase in your wages, the expenses incurred for the organization and upkeep of the combinations.
And we, as socialists, tell you that, apart from the money question, you will continue nonetheless to be workers, and the masters will still continue to be the masters, just as before. So no combination! No politics! For is not entering into combination engaging in politics?
The economists want the workers to remain in society as it is constituted and as it has been signed and sealed by them in their manuals.
The socialists want the workers to leave the old society alone, the better to be able to enter the new society which they have prepared for them with so much foresight.
In spite of both of them, in spite of manuals and utopias, combination has not yet ceased for an instant to go forward and grow with the development and growth of modern industry. It has now reached such a stage, that the degree to which combination has developed in any country clearly marks the rank it occupies in the hierarchy of the world market. England, whose industry has attained the highest degree of development, has the biggest and best organized combinations.
In England, they have not stopped at partial combinations which have no other objective than a passing strike, and which disappear with it. Permanent combinations have been formed, trades unions, which serve as ramparts for the workers in their struggles with the employers. And at the present time all these local trades unions find a rallying point in the National Association of United Trades, the central committee of which is in London, and which already numbers 80,000 members. The organization of these strikes, combinations, and trades unions went on simultaneously with the political struggles of the workers, who now constitute a large political party, under the name of Chartists.
The first attempt of workers to associate among themselves always takes place in the form of combinations....