The Law of Supply and demand was not promulgated in any code. Its power comes from elsewhere. It imposes itself upon mankind in as implacable a way as hunger and thirst. We furnish fresh demonstrations of its truth, whether willingly or not, even while we imagine ourselves to be violating it. If the Socialist excommunicates and abuses the economist, who formulates this law, he should also hold Newton responsible for all the tiles that fall on the heads of passers-by, and should declare that if some poor wretch, in throwing himself from a window, kills himself, it is the fault of those physicists who have discovered and taught the law of gravitation.