Karl Marx originally had the plan, in 1865, to write Das Kapital. Volume 1 he could finish, but he still had three volumes worth of notes left. The rest of his life he was too busy - atleast, between the moments when he was busy living like a bourgeous - stoking up controversy and organising international communism to finish his magnum opus. Then, the man passed away in 1883, after his daughter had died some months earlier. After this event, his life-long friend Friedrich Engels started to get the manuscripts for the remaining volumes of Das Kapital ready for publishing.
But there is of course the problem that Marx once was busy collecting materials for the remaining volumes and had written full chapters, but also long trains of thoughts - to be worked out at a later date. Anyaway, the end result is that Engels had to either publish the work in its manuscriptural form - which would have been a disaster (terribly unreadable) -, or else he would have to polish the existing chapters and supplement the unfinished ones with his own ideas and present it as a whole. He chose the last option.
The problem? Volume 2 is as dry as anything you can imagine - and then some. It's almost unreadable for modern day readers and it could have used an editor with an eye for conciseness and accessibility of texts. But so could Das Kapital Volume 1 - which is as inaccessible and unreadable as Volume 2, but was written and published by Marx himself in a complete form. The real problems start with Volume 3. Engels writes in the (long) preface that he tried to supplement and polish certain parts of the book more than three times, after which he gave up and decided to write down his own words, based on Marx's ideas. Many chapters that he simply edited somewhat are terribly unfocused and contain much repetitive and/or redundant materials.
In short: Das Kapital Volume 3 is just a terribly bad book. It is extremely long (1100 pages plain text); it is not one whole but rather a collection of loose chapters and parts; much material is presented in terribly convoluted form; and it simply is written in a way that makes the book a pain to read (and keep reading).
The problem is, the material in the book is interesting. And the book itself has a definite place in Marx's criticism of political economy. In Volume 1 he looked at the essence of capitalism: the process of production. How is value created? Whence does it arise? And what are the consequences of this mode of production? Then, in Volume 2, Marx leaves the ground and soars high up in the sky, looking down on capitalism as a continuous system of which production is only one part. According to Marx, capital is value in motion: money is exchanged for commodities; commodities are used, along with labour, in the process of production; the commodities are then sold again on the market with profit; the bigger value is then re-invested; and so the cycle continues. The faster value moves, the more value is created; turnover rates are an essential ingredient of capitalism, hence the important place of transport, communications, money (in the form of credit), reducing fixed and replacing it with circulating capital - anything that speeds up or smoothens the process helps.
With Volume 3, Marx planned to show how capitalism worked out in the real world. Now we know how and by whom value is created, and how the movement of value is essential, we need to look at the more detailed picture. After the commodities are produced, the capitalist tries to sells his goods on the market and make a profit. But what is profit? Is it surplus value? Is it something different? And what does the rate of profit have to do with the surplus value? And what are the effects of the latter connection? These sorts of questions were meant to be answered in Volume 3.
And for a big part they are. The first four parts (about 45% of the book) are really breath-taking. They are truly hard to digest, but if one has paid attention in Volume 1 and 2 to what Marx was saying, the new material clicks into place rather easily. It's just that Marx has a terrible way of presenting his materials, and that Engels hasn't really done anything about it.
The main ideas:
1. Profit is surplus value as it shows its face to the capitalist and the market. The capitalist sees his commodity being sold for a certain price, and consequently thinks the market determines the price and value of the commodity. If pushed, he looks at his production processes and sees the cost price - the constant and variable capital that went into the materials, including labour, to produce the commodity -, deducts this amount from the product price and sees the profit. Marx shows how profit is nothing but surplus value and how this form of appearance hides the generator of value: exploitation of labour. It's labour that generates surplus value, not the market.
The rate of profit in this sense is nothing but the proportion of surplus value to the total capital expended to generate this surplus value. And here the difference shows itself: the rate of surplus value is the proportion of surplus value to just variable capital (i.e. labour) expended to generate this surplus value. With this distinction, Marx has a tool with which to look at the market from a whole new perspective.
2. Up to now, Marx looks as the profit and profit rate of an individual capital. But of course individual capital is part of the entire system of capitalism. Individual capital expended on production of a commodity is part of the total capital expended on all commodities. And it's the same with the rate of surplus value, the profit, and the profit rate.
But now, when we look at the rate of profit from the perspective of the social production (i.e. marcoeconomics), we see something happening. Within a certain branche of production, all the individual rates of profits (just like anything else) goes into the sum total of all rate of profits. This total is then, on the market, redistributed over all the individual capitals - just like the market value and the market price are in essence nothing but the average values and average prices of all the commodities on the markets.
And here capitalism shows it's true face: competition. An individual capital can be more or less than the average. Just like an individual profit can be more or less than the average profit. And the average rate of profit is the rate of profit as an aggregation of all the individual rates of profits. It is this factor that's leading in capitalism, not the individual rate of profit. The laws of capitalism make all capitalists pawns in its game, just like it makes every labourer a pawn. The individual capitalist just plays along, but in reality is, ultimately, nothing but a temporary robot.
For the capitalist, who looks at the market from his own, money-making perspective, all that exists are market prices and market values, and he tries to cut down on the cost price of his own commodities, while trying to sell his commodities dearer than his competitors. Political economics - Adam Smith, David Ricardo, and their followers - look at the market to determine value, while Marx looks at the essence of value - labour - and sees the market, with all it's fluctuations, as the logical consequence of this capitalist mode of production.
3. The average rate of profit is the death knell of capitalism. When looked at from the perspective of social production, the rate of profit is the inherent contradiction that runs down the whole system.
Why? Because the rate of profit is nothing but the proportion of surplus value to total capital expended on generating this surplus value. But this total capital is composed of constant capital - land, buildings, machinery, raw materials, ancillary materials, etc. - and variable capital - wages paied. Since variable capital, wages, generate surplus value, it follows that the higher the ratio of variable to constant capital, the higher the rate of surlus value and the higher the rate of profit.
But what happens in capitalism? Capital accumulates. Bigger capitals can pay more wages and generate more surplus value. Bigger capitals also offer economy of scale and the adaptation of innovation and technology. In short: bigger capitals are more productive. Capitalists are forced, by the laws of capitalism, to perpetually increase labour productivity - producing ever more by ever fewer hands.
In other words: capitalism thrives on development, always increasing the component of constant capital and always decreasing the component variable capital. The value generating element - labour - is perpetually becoming less and less a part of the total capital spend on the total surplus value. Investing in constant capital is also much more expensive than wages.
This, all combined, means that the amount of total capital is comprising more and more - highly expensive - constant capital, leading to lower and lower proportion of surplus value to the total capital spend on it. And what was the rate of profit? Right, surplus value to total capital. So capitalism eats itself. What this 'law of the tendency of the fall in profit' basically says is that capitalism forces capitalists to spend steadily more on capital, forcing down the rates of profit - even when the new machinery puts more people to work (increasing variable capital and hence total capital slightly), and even when this leads to more surplus value, the rate of profit will go down.
The consequences of this? You need more and more money to generate profit. And since capital is nothing but value in motion, capital that stops moving evaporates. Capital thus gets concentrated in the hands of fewer and fewer people, since the concentration of capital is what keeps the profits - harder to make by the day - coming in. More and more smaller capitalists are thus reduced to the rabble: the fall of the rate of profit creates overpopulations of labourers, presses down wages, all the while producing cheaper and cheaper goods (since the labour factor, and hence surplus value, and hence product value, decreases).
Capital accumulates, and this 'law of accumulation' is nothing but saying that ever-increasing capital is needed to keep the production processes running, 'the law of the tendency of the fall in profit rate'. In short: both laws are one and the same!
And this process of accumulation or the fall in profit rates will, according to Marx, speed up ever faster. The only way that profits can be made is through crises. But the longer capital continues to accumulate and profit rates continue to drop, more and bigger crises are needed to keep the system running.
4. And then the most interesting part of the book is over. Marx tells us in part 4 how merchant capital and money capital (i.e. credit) is used as oil in the capitalist system of production. Merchants don't generate any surplus value, although the exploit labour all the same: they don't add any value to the products but only sell them dearer than they were bought for. (No wonder Engels called merchants 'parasitical sycophants' in his own works.)
The same with money lenders. Capitalism is characterized by time lags. No matter how far up the production chain you look, ultimately, all the raw materials that are used in production are products of nature. And nature knows boundaries. It takes time for sheep to grow wool and for potatoes to become eatable. This means that supply follows demand; market prices start to rise, leading to over-investments; then, when, over time, supply grows, and demand declines, an overabundance of goods floods the market and capitalists go bankrupt. Crises are inherent consequences of capitalism - this is capitalism for you.
Money credit can be used to keep the machine going, so to speak, buffering the effects of time delayed issues. You can borrow money and start investing already, just like you can buy now and pay later. Money smoothens the circulation of capital and hence keeps value in motion. But like the merchants, creditors are, ultimately, parasites - not adding value to anything and living of interests.
After this, Das Kapital Volume 3 goes on for more than 500 pages. The problem is, part 5 (almost 300 pages of this) was so terrible that Engels tried reworking it three times - spending a year on this - and ultimately decided to rearrange all the original materials and stuffing it up on his own account where necessary. This makes for terrible reading (just like Part 4 already suffers from some of these ills). The first half of the book clearly looks at the division of profit and wages; the rest of the book (parts 4-7) is occupied with the division of profit: interest on profit, interest on loans, rent, taxes, etc.
Due to the poor structure and text I decided to leave it at that. I have ploughed through Volumes 1 and 2, and made it halfway across Volume 3 - I am now familiar with the main ideas of Marx. And I am truly happy that I decided to spend some days off last couple of weeks to read more of Marx and Engels. They were important historical figures and one understands history, as well as current times, better when one has read the original works.
My final verdict is this. The works of Marx should be put into two categories. His political works, guided by both his agenda of spreading communism all over the world and his opposition to classes and groups of people. These works are toxic, aggressive and provocative.
But then there is his critical analysis of political economy, Das Kapital Volumes 1-3 (and, maybe, 4) deal specifically with an exhaustive and all-encompassing analysis of the capitalist mode of production that he saw first conquering Great Britain, and slowly the world. Marx's economic studies are brilliant in their originality, sharpness of critque and their tracing out of all the minute details. I can honestly mention no economist who comes close this. But at the same time, Marx studied economics philosophically, while modern day economics is much more empirical: it studies economic trends and facts as they actually are. What one can learn from Marx is to try to look at the same object from a different perspective, and suddenly discover a plethora of new, intriguing things.
And much of his ideas are still valuable today. In that sence, Marx was right in many of his general conclusions and observations, although it isn't really fanciful to say this nowadays. To name just one: his analysis of and critique on merchants capital is spot on. Ultimately, Ikea, Nike and Walmart are nothing but parasitical money-grabbers. Apple literally sucks up surplus value from its exploited labourers - it doesn't do anything but make others objectify its ideas and designs. H&M does nothing but squeeze out everything they can from Asian women working in sweatshops; it doesn't generate any value - all it does it put its logo on it, distribute the clothing all over the world, and sell it much dearer than it is bought for. IKEA's purchasing manager is doing exactly what Marx tells us he does: look at product prices, deduct his own cost price from it, and try to sell it as dear as possible on the market- not realising whence the value comes from.
So from that point of view, Marx is very recommendable to read. The problem is the 2500+ pages (of plain text) one has to wrestle through. Highly problematic - Marx (or Engels) should have just cut down his works to their bare essence. And maybe re-write the abstract parts. Would have been much better...