Capitalism stands its trial before judges who have the sentence of death in their pockets. They are going to pass it, whatever the defense they may hear; the only success victorious defense can possibly produce is a change in the indictment.
—Joseph Schumpeter
From its beginning, the common wisdom has been that capitalism is bad. It is claimed that capitalism is ethically wrong, has bad practical consequences, and is unnecessary. But this claim is entirely false—in fact, the opposite is true: capitalism is both morally and practically optimal, and there is no other possible social arrangement compatible with modern society.
It is important to precisely define ‘capitalism’ from the outset to avoid being misunderstood. Capitalism is the free market system, based on property, contract, and voluntary exchange. In a truly free society, where people are free to live as they please, free markets are practically guaranteed to arise as the result of voluntary production and trade undertaken by people seeking to improve their conditions. In other words, capitalism is the default social system of a free society.
Much of the anti-capitalistic sentiment is aimed not at this voluntaristic conception, but at the currently existing system of state capitalism. This interventionist system is characterized by a market that is no longer free but hampered by all sorts of government restrictions, which result in many undesirable and unintended consequences. It is primarily these outcomes that the anti-capitalists—in mistakenly attributing them to free market capitalism—object to.
Morality
A widely held objection to capitalism is that it is immoral. This charge is mainly based on Marx’s claim that capitalists exploit laborers by taking as profits what properly belongs to the workers. This incredibly naive view was exploded long ago, but it persists today among those ignorant of economics—it can hardly be denied that profits are widely considered antisocial and evil.
Marxian exploitation can only exist if goods acquire their value from the labor imbued in them. But this notion—the labor theory of value—was long ago rejected and replaced by the subjectivist notion of prices being determined by the relationship between supply and demand. It turned out that the persistent profit that Marx thought was a sure sign of exploitation was in fact an interest return—compensation to the capitalist for purchasing inputs such as materials and labor up front and only collecting revenue from sales later on. In fact, if the workers wished to earn this interest return, they could arrange to be paid only once the goods are sold. The fact that they do not indicates that they prefer to forgo the interest return in favor of regular, steady pay.
As capitalism has showered the common man with wealth and eliminated mass poverty wherever freedom has existed, the anti-capitalists have resorted to accusing capitalism of corroding virtue. According to them, capitalism breeds consumerism, materialism, and selfishness. While this is manifestly not true, even if it were, what is the alternative? People can only exhibit virtue if they are free to choose so. Forced virtue is not virtue at all. Only freedom—which entails capitalism—can allow people to exhibit virtue.
Capitalism is merely the result of leaving people free to live as they please (provided that they do not infringe on the freedom of others.) If they decide to engage in mutually consensual capitalist acts, who has any right to interfere? Capitalism is the outcome of freedom: any attempts by government to curtail capitalism must do so at the expense of freedom. Capitalism and freedom share the same fate.
Economics
Another popular myth is that capitalism enriches the capitalists and impoverishes the masses. This is flatly contradicted by history—the common person has been lifted out of poverty and has gone on to become fantastically wealthy as a result of capitalistic mass production. Economic science can explain: competition among firms brings prices down to the level of costs, and it also creates strong incentives for innovation. Large scale production has brought the unit cost, and hence price, of most goods down to levels easily within the reach of the common person.
This myth is rooted in zero-sum thinking—that the gains of business come at the expense of the rest of us. But voluntary exchanges benefit both parties, otherwise the exchanges would not occur. Capitalism is positive-sum: businesses earn their incomes by competing to sell goods that consumers want. Capitalists become rich by enriching consumers with better and cheaper goods. They lose their wealth as soon as they fail to stay abreast of the competition to serve consumers.
In fact, the fruits of capitalist efforts largely accrue to workers. Increased capital investment reduces unit production costs while competition quickly eats away any profits that arise. But more capital also increases the productivity of labor, so wages get bid up by competing employers. So, while capitalists earn fleeting profits, workers enjoy a steady rise in wages. Truly, capitalism is good to the common person, both as a consumer and a worker.
Faced with these arguments, opponents of capitalism often turn around and blame capitalism for being unsustainable. Capitalism, they say, is short-sighted. It depletes the earth’s resources without concern for the future. Such arguments are totally wrong, ignoring the fact that prices serve to allocate resources through time. For example, if it was forecast that X would run out in a few years, speculators would buy lots of X now in order to sell it later at a higher price. By doing so, speculators conserve X today for use in the future. The higher present price of X would guide people to use X more efficiently and sparingly, and to find substitutes.
Necessity
Finally, for all their hatred of capitalism, the critics have no workable alternative compatible with modern living standards for the common person. The more the market is hampered by government interventions, the worse off the common person will be. And there are no non-market alternatives that could sustain modern society. Society is a bottom up, emergent order, incompatible with top down management.
Conclusion
But if all these claims of the anti-capitalists are false, why are these ideas so popular? Why have the correct ideas not slowly gained acceptance over time? Evolutionary psychology provides the answer: the aversion to capitalism is an artifact of our evolution in small communal bands. In the world of our distant ancestors, such things as zero-sum thinking and judging actions based on their intentions were pretty good rules to follow. But in the modern world, they are wholly inaccurate and can only serve to stand in the way of progress for the bulk of humanity.
The claims of the anti-capitalists are not only completely false, but totally backwards. Capitalism is the product of a society where each is free to live and associate as they wish. Interventionism and socialism depend on government force and are thus inescapably exploitative. Capitalism, far from impoverishing the masses, enriches them at an incredible rate. Far from being unsustainable, capitalism allocates resources optimally between present and future.
Capitalism is the optimal social arrangement on both moral and practical grounds. But if people are bound to believe otherwise because of their evolved preferences, then a counteracting educational program is of utmost importance. The ideas are simple yet powerful, but the challenge is to get them heard.

Like a true capitalist you’ve let out much of the story in order to frame something in a way that supports you. Even wikipedia presents a more accurate picture of Capitalism, including mentioning private ownership, wage labour, for profit production, and well as so called free, competitive markets.
The picture you present implies everyone will own a market to participate, but under capitalism, theoretically and realisticly, that is not true. Capitalism realies on a profit mechanism, therefore un-sustainability, labour exploitation, and basically exclusion of many. Some of the many are disproportionately affected more than others.
Anarchism socialism, anarchist feminism, anarchist syndicalism creates conditions based on actual freedom for all. How can there be freedom in a world dictacted by private ownership. Simply understanding colonialisation, which is still going on today- presents the injustice of capitalism. Some people just walked over and claimed to own the land inhabited by others. Who owns the earth? No one. Who owns other people? No one.
Then why does capitalism, as you call “moral”, create these conditions?
If you deny property rights altogether, that's a whole other issue. Once we admit property rights, free market capitalism follows. Government, by definition, violates property rights. Without government, you could have all sorts of voluntary socialism, syndicalism, etc, but you'd pretty much be guaranteed to get markets as well.
@ frame correctly please: I like how you find conclusions based on statements without showing why anything you conclude could happen, and just saying it does. He is not implying that everyone will own a market, nor does everyone have to. Exclusion? From what? How? Profits are the natural product of time preference (interest), wages, and prices. In a VOLUNTARY society, how is there exploitation when anyone is free to work for someone or not? Your reaction to capitalism is based on an initial problem but you have no idea how those problems are then solved by capitalism.
Just the fact that you state "How can there be freedom in a world dictated by private ownership" shows you really don't understand private property rights. Public ownership creates conflict, not solves it. Read some Hoppe on the ethics and economics. Learn about the socialist calculation problem and you might learn a thing or two.
I have a couple of questions/points of critique. First – you’ve argued here that the labour theory of value was long ago “exploded,” and replaced by the “subjectivist notion of prices being determined by the relationship between supply and demand.” But it’s not clear in this article how the relationship between supply-and-demand “determines” prices, as you put it. It’s obvious, of course, that the relationship between supply-and-demand determines fluctuations in commodity prices – an increase in the supply of, vis-à-vis the demand for, a particular commodity will decrease the price of that commodity, and an increase in demand vis-à-vis supply will increase its price. But it’s not at all obvious how the relationship between supply-and-demand determines the general level around commodity prices fluctuate – why is it that the price of bread, for instance, fluctuates around three dollars per loaf, instead of thirty or three-hundred dollars per loaf?
Second – you’ve made a distinction here between “free market capitalism” and what you’ve called here “state capitalism.” You’re also claiming that the former is the more efficient system, and will ultimately produce greater wealth, if not equality, for all, whereas the latter produces “undesirable and unintended consequences.” But this is not the case historically. In fact, the opposite is true – the period 1945 to the mid-1970s is often called the “Golden Age” by historians, since income inequalities were at their lowest in the United States, Canada and most of the Western European countries, and growth rates averaged between 4 and 5 percent. This period, though, was not characterized by anything close to a “free market,” since states imposed restrictions on cross-border capital flows, and also established numerous social welfare programs that did not operate according to free market logic. By contrast, the period since the late-1970s, and especially since the 1980s, has been characterized by the dismantling of the capital controls and social programs established during the early postwar period. In short, since the late-1970s, the market has been more “free” than ever. But income inequality in the United States, Canada and Western Europe has also been greater than ever during this period. And growth, moreover, has been slower in this period, usually hovering around 2 percent. So in light of this historical evidence, I’m wondering: how would you justify your claim that free market capitalism, “far from impoverishing the masses, enriches them at an incredible rate?”
Without big government big business would be in deep squalor, mainly because big business relies upon big government whom big business helped into politics to begin with with big money to employ the methodology of big regulation and unrestrained laws for big business to keep the absent bodied competetion at bay simply through the acts of regulatory laws. This is what we today call capitalism.
Peditory cannibal capitalism has always existed. It resembles the Beast of the book of revelations. The beast is a hunter. The beast is of Satan the Devil, the beast only cares about power, which is derived by the governed substance which is called wealth, and leads to preditory cannibalism with no remorse. It promotes taking life. And has no value or regard for life of any form.
The number of its registration 666. And none are able to buy or sell without, be it rich or poor.
The Son of Predition.
Jesus"For what does it profit a man to gain the whole world and lose his soul"