It is related of the Lacedemonians, that while all the other citizens of Greece were careful to surround their towns with walls, they alone left a part open on all sides. Thus, superiority in the field rendered them indifferent to the adventitious protection of ramparts. It is for a similar reason that England is now willing to throw down the barriers of tariffs, and the impediments of custom-houses; and that all other nations are fain to raise them up. It is a secret sense of superiority on the one side, and of inferiority on the other, which is the cause of the difference. We advocate freedom of trade, because we are conscious that, in a fair unrestricted competition, we should succeed in beating them out of their own market. They resist it, and loudly clamour for protection, because they are aware that such a result would speedily take place, and that the superiority of the old commercial state is such, that on an open trial of strength, it must at once prove fatal to its younger rivals. As this effect is thus the result of permanent causes affecting both sides, it may fairly be presumed that it will be lasting; and that the more anxiously the old manufacturing state advocates or acts upon freedom of commercial intercourse, the more strenuously will the younger and rising ones advocate protection. Reciprocity, therefore, is out of the question between them: for it never could exist without the destruction of the manufactures of the younger state; and if that state has begun to enter on the path of manufacturing industry, it never will be permitted by its government. But this is not all. If free trade must of necessity prove fatal to the manufactures of the younger state, it as certainly leads to the destruction _of the agriculture of the older;_ and it is this double effect this RECIPROCITY OF EVIL, which renders it so disastrous and impracticable an experiment for both the older and the younger community. The reason of this has not hitherto been generally attended to; but when once it is stated, its force becomes obvious, and it furnishes the true answer on principle to the delusive doctrines of free trade.