Two subjects, one of which might fall within a general commercial power, and the other within a general power to raise revenues, had already been incidentally alluded to, and both were likely to create great embarrassment. General Pinckney had twice given notice that South Carolina could not accede to the new Union proposed, if it possessed a power to tax exports.[211] It had also become apparent, in the discussions and arrangements respecting the apportionment of representatives, that the possible encouragement of the slave-trade, which might follow an admission of the blacks into the rule of representation, was one great obstacle, in the view of the Northern States, to such an admission; and at the same time, that it was very doubtful whether all the Southern States would surrender to the general government the power to prohibit that trade.[212] The compromise which had already taken place on the subject of representation had settled the principles on which that difficult matter was to be arranged. But the power to increase the slave populations by continued importation had not been agreed to be surrendered; and unless some satisfactory and reasonable adjustment could be made on this subject, there could be no probability that the Constitution would be finally ratified by the people of the Northern States.[213] It is necessary, therefore, to look carefully at these two subjects, namely, the taxation of exports and the prohibition of the slave-trade.
That a power to lay taxes or duties on exported products belongs to every government possessing a general authority to select the objects from which its revenues are to be derived, is a proposition which admits of little doubt. It is not to be doubted, either, that it is a power which may be attended with great benefit, not only for purposes of revenue, but for the encouragement of manufactures; and it is clear that it may often be used as a means of controlling the commercial policy of other countries, when applied to articles which they cannot produce, but which they must consume. A government that is destitute of this power is not armed with the most complete and effectual means for counteracting the regulations of foreign countries that bear heavily upon the industrial pursuits of its people, although it may have other and sufficient sources of revenue; and therefore, until an unrestricted commercial intercourse and a free exchange of commodities become the general policy of the world, to deny to any government a power over the exported products of its own country, is to place it at some disadvantage with all commercial nations that possess the power to enhance the price of commodities which they themselves produce.