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Rh law-givers, philosophers, constitution-makers, and legislators can work. It is the opening of the new continents and the great discoveries and inventions which have made this modern age; they account for the power of man, and they have, by their form, conditioned the mode in which that power might be used. It has been wasted and abused to such an extent that man has never enjoyed more than a small percentage of the real power which was at his disposal for the enhancement of his earthly existence; and the modes in which it has been wasted have been chiefly those of social policy and political device. The ignorance, folly, and wickedness of statesmen, together with the incompetence of the social philosophers, seem great enough to have brought the world to universal penury, if the discoveries of science and the inventions of art had not been rapid and strong enough to bear all the losses and leave a surplus, by virtue of which mankind could gain something. The chief source of new power, however, has been the simplest of all, that is, an extension of population over new land. If a half-million proletarians in Europe should inherit each an estate, no one would think it any mystery that they were not proletarians any more; why, then, should it be a mystery that they are not proletarians when they have inherited an estate in America or Australia by going to it? To this we append, in passing, another useful reflection. If the statesmen and philosophers of the past made such mistakes, which are now visible to us, how do we know we are not making equally gross mistakes, which somebody will expose a century hence? We do not know it. We should hold this ever in mind. It is exactly the reason for distrusting our wisdom and for "letting things alone."