For effectiveness, it shared to some extent the characteristic features of legislation for making water run up hill. It retarded commercial development all over the world, fostered monopolies, made the rich richer and the poor poorer, hindered the interchange of ideas and the refinement of manners, and sacrificed millions of human lives in misdirected warfare; but what it was intended to do it did not do. The sturdy race of smugglers--those despised pioneers of a higher civilization--thrived in defiance of kings and parliaments; and as it was impossible to carry out such legislation thoroughly without stopping trade altogether, colonies and mother countries contrived to increase their wealth in spite of it. The colonies, however, understood the animus of the theory in so far as it was directed against them, and the revolutionary sentiment in America had gained much of its strength from the protest against this one-sided justice. In one of its most important aspects, the Revolution was a deadly blow aimed at the old system of trade restrictions. It was to a certain extent a step in realization of the noble doctrines of Adam Smith. But where the scientific thinker grasped the whole principle involved in the matter, the practical statesmen saw only the special application which seemed to concern them for the moment. They all understood that the Revolution had set them free to trade with other countries than England, but very few of them understood that, whatever countries trade together, the one cannot hope to benefit by impoverishing the other.