But in order that a sound judgment may be formed of the correctness of Hamilton's opinions, and of the useful influence which they exerted, it must be remembered that there was an inconsistency in the Virginia plan, which he was then aiming to exhibit. That plan was a purely national system; it drew both branches of the national legislature from the people of the States, in proportion to their numbers, and merely interposed the legislatures of the States as the electors of so many senators as the State might be entitled to have according to the ratio of representation. Its inconsistency lay in the fact, that, while it would have created a government in which the proportionate principle of representation would have obtained in both houses, making a purely national government, in which the States, as equal political corporations, could have exercised no direct control over its legislation, it left the separate political sovereignties of the States almost wholly unimpaired, taking from them jurisdiction over such subjects only as seemed to require national legislation. The operation of such a system must necessarily have involved perpetual conflicts between national and State power; for the States, possessed of a large part of their original sovereignties, and yet unable to exert an equal control in either branch of Congress, would have been constantly tempted and obliged to exert the indirect power of their separate legislation against the direct and democratic force of a majority of the people of the United States. To such a system, the objection urged by Hamilton, that it presented a democratic House checked by a democratic Senate, was strikingly applicable. This objection, it is true, was not presented by him as a reason for admitting the States to a direct and equal representation in the government; he employed it to enforce the expediency of giving to the Senate a different basis from that of the House, and one farther removed from popular influences. But when, at a subsequent period, the first great compromise of the Constitution--that between a purely national and a purely federal system--took place by the admission of the States to an equal representation in the Senate, the force of Hamilton's reasoning was felt, and the necessity for a check as between the two houses, founded on a difference of origin, which he had so strenuously maintained, both facilitated and hastened the concession to the demands of the smaller States.