[...] the most far-reaching and significant of Marx's assumptions concerns the unchallenged power of private property rights in both production and exchange. It is in this context that he also assumes perfect competition in the market place. He accepts Adam Smith's theory of 'the hidden hand' although he insists that the hidden hand is that of labour not that of capital. Monopoly power is assumed away. Why he adopted these assumptions is an interesting question. My guess is that Marx's primary intent in Capital is to deconstruct the utopian vision of free market capitalism that the political economists of the time were promoting. He wishes to show how market freedoms do not produce a result that is beneficial for all, as Smith and others supposed, but that it would produce a dystopia of misery for the masses and immense wealth for the propertied capitalist class.