But the ingrained inability of such men to understand that which they would revolutionise does not reveal itself in their errors of theory only. It reveals itself still more strikingly in their own relations to life. If we allow for exceptional cases, such as that of Robert Owen, who was in his earlier days a competent man of business, we shall find that the theorists who desire to socialise wealth are generically deficient in the higher energies that produce it. Though they doubtless could, like most men who are not cripples or idiots, make a living by some form of manual labour, they have none of them done anything to enlarge the powers of industry, or even to sustain them at their present pitch of efficiency. They have never made two blades of grass grow where one blade grew before. They have never applied chemistry to the commercial manufacture of chemicals. They have never organised the systems or improved the ships and engines by which food finds its way from the prairies to the cities which would else be starving. If in some city or district an old industry declines they demand with tears that the thousands thus thrown out of employment shall be set by the state to do or produce something, even though this be a something which is not wanted by anybody. They never set themselves to devise, as was done in the English Midlands, some new commodity, such as the modern bicycle, which was not only a means of providing the labourers with a maintenance, but was also a notable addition to the wealth of the world at large. They fail to do these things for the simple reason that they cannot do them; and they cannot do them because they are deficient alike in the interest requisite for understanding how they are done, and in the concentrated practical energy which is no less requisite for the doing of them.