16. This is the fundamental fallacy of protection to which the analysis will bring us back again and again. Scientifically stated, it is that _protectionism sins against the conservation of energy_. More simply stated, it is that _the protectionist either never sees or does not tell the other side of the account, the cost, the outlay for the gains which he alleges from protection, and that when these are examined and weighed they are sure vastly to exceed the gains, if the gains were real_, even taking no account of the harm to national growth which is done by restriction and interference. 17. There are only three ways in which a man can part with his product, and different kinds of taxes fall under different modes of alienating one’s goods. First, he may exchange his product for the product of others. Then he parts with his property voluntarily, and for an equivalent. Taxes which are paid for peace, order, and security, fall under this head. Secondly, he may give his product away. Then he parts with it voluntarily without an equivalent. Taxes which are voluntarily paid for schools, libraries, parks, etc., fall under this head. Thirdly, he may be robbed of it. Then he parts with it involuntarily and without an equivalent. Taxes which are protective fall under this head. The analysis is exhaustive, and there is no other place for them. Protective taxes are those which a man pays to his neighbor to hire him (the neighbor) to carry on his own business. The first man gets no equivalent (§ 108). Hence any one who says that a tariff is not a tax would have to put it in some such category as tribute, plunder, or robbery. In order, then, that we may not give any occasion for even an unjust charge of using hard words, let us go back and call it a tax. 18. In any case it is plain that _we have before us the case of two Americans_. The protectionists who try to discuss the subject always go off to talk English politics and history, or Ireland, or India, or Turkey. I shall not follow them. I shall discuss the case between two Americans, which is the only case there is. Whether Englishmen like our tariff or not is of no consequence. As a matter of fact, Englishmen seem to have come to the opinion that if Americans will take their own home market as their share, and will keep out of the world’s market, they (the Englishmen) will agree to the arrangement; but it is immaterial whether they agree, or are angry. The only question for us is: What kind of an arrangement is it for one American to tax another American? How does it work? Who gains by it? How does it affect our national prosperity? These and these only are the questions which I intend to discuss.