You know that the population ...

You know that the population is of this planet is now ten times greater than it was in the ages preceding capitalism.; you know that all men today enjoy a higher standard of living than your ancestors did before the age of capitalism. But how do you know that you are the one out of ten who would have lived in the absence of capitalism? The mere fact that you are living today is proof that capitalism has succeeded, whether or not you consider your own life very valuable.
You know that the population is of this planet is now ten times greater than it was in the ages preceding capitalism.; you know that all men today enjoy a higher standard of living than your ancestors did before the age of capitalism. But how do you know that you are the one out of ten who would have lived in the absence of capitalism? The mere fact that you are living today is proof that capitalism has succeeded, whether or not you consider your own life very valuable.
 Ludwig von Mises

Quotes from the same author

In a game there are winners and losers. But a business deal is always advantageous for both parties. If both the buyer and the seller were not to consider the transaction as the most advantageous action they could choose under the prevailing conditions, they would not enter into the deal.
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 Ludwig von Mises
The state is the only institution entitled to apply coercion and compulsion and to inflict harm upon individuals. This tremendous power cannot be abandoned to the discretion of some men, however competent and clever they may deem themselves. It is necessary to restrict its application. This is the task of the laws.
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 Ludwig von Mises
There is no means by which anyone can evade his personal responsibility. Whoever neglects to examine to the best of his abilities all the problems involved voluntarily surrenders his birthright to a selfappointed elite of supermen. In such vital matters blind reliance upon 'experts' and uncritical acceptance of popular catchwords and prejudices is tantamount to the abandonment of self-determination and to yielding to other people's domination. As conditions are today, nothing can be more important to every intelligent man than economics. His own fate and that of his progeny are at stake.
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 Ludwig von Mises
There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved.
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 Ludwig von Mises
The law-abiding citizen by his labor serves both himself and his fellow man and thereby integrates himself peacefully into the social order. The robber, on the other hand, is intent, not on honest toil, but on the forcible appropriation of the fruits of others' labor.
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 Ludwig von Mises