The preamble of the Constitution represents the aspirations of the American Fathers; the clauses represent the furthest they dared towards those aspirations. The preamble was therefore always the rallying point of those who wished to see America one nation. Its operative clause ran: "We, the People of the United States, in order to form a more perfect Union, ... do ordain and establish this Constitution for the United States of America." That such language was a strong point in favour of the Federalist interpreters of the Constitution was afterwards implicitly admitted by the extreme exponents of State Sovereignty themselves, for when they came to frame for their own Confederacy a Constitution reflecting their own views they made a most significant alteration. The corresponding clause in the Constitution of the Southern Confederacy ran, "We, _the deputies of the Sovereign and Independent States_, ... do ordain," etc., etc. For the rest two great practical measures which involved no overbold challenge to State Sovereignty were wisely planned to buttress the Union and render it permanent. A clause in the Constitution forbade tariffs between the States and established complete Free Trade within the limits of the Union. An even more important step was that by which the various States which claimed territory in the as yet undeveloped interior were induced to surrender such territory to the collective ownership of the Federation. This at once gave the States a new motive for unity, a common inheritance which any State refusing or abandoning union must surrender.