I have shown the advantages which the Americans derive from their federal system; it remains for me to point out the circumstances which rendered that system practicable, as its benefits are not to be enjoyed by all nations. The incidental defects of the Federal system which originate in the laws may be corrected by the skill of the legislator, but there are further evils inherent in the system which cannot be counteracted by the peoples which adopt it. These nations must therefore find the strength necessary to support the natural imperfections of their Government. The most prominent evil of all Federal systems is the very complex nature of the means they employ. Two sovereignties are necessarily in presence of each other. The legislator may simplify and equalize the action of these two sovereignties, by limiting each of them to a sphere of authority accurately defined; but he cannot combine them into one, or prevent them from coming into collision at certain points. The Federal system therefore rests upon a theory which is necessarily complicated, and which demands the daily exercise of a considerable share of discretion on the part of those it governs. A proposition must be plain to be adopted by the understanding of a people. A false notion which is clear and precise will always meet with a greater number of adherents in the world than a true principle which is obscure or involved. Hence it arises that parties, which are like small communities in the heart of the nation, invariably adopt some principle or some name as a symbol, which very inadequately represents the end they have in view and the means which are at their disposal, but without which they could neither act nor subsist. The governments which are founded upon a single principle or a single feeling which is easily defined are perhaps not the best, but they are unquestionably the strongest and the most durable in the world. In examining the Constitution of the United States, which is the most perfect federal constitution that ever existed, one is startled, on the other hand, at the variety of information and the excellence of discretion which it presupposes in the people whom it is meant to govern. The government of the Union depends entirely upon legal fictions; the Union is an ideal nation which only exists in the mind, and whose limits and extent can only be discerned by the understanding.