The constitutions of the separate States of the Union were doubtless rooted in the habits, sentiments, and ideas of their inhabitants. But the Constitution of the United States could not possess this advantage, however felicitously it may have been framed for the purpose of keeping, for a considerable period, peace between the different sections of the country. As long, therefore, as the institution of negro slavery lasted, it could not be called a Constitution of States organically "United"; for it lacked the principle of _growth_, which characterizes all constitutions of government which are really adapted to the progressive needs of a people, if the people have in them any impulse which stimulates them to advance. The unwritten constitution of Great Britain has this advantage, that a decree of Parliament can alter the whole representative system, annihilating by a vote of the two houses all laws which the Parliament had enacted in former years. In Great Britain, therefore, a measure which any Imperial Parliament passes becomes at once the supreme law of the land, though it may nullify a great number of laws which previous Parliaments had passed under different conditions of the sentiment of the nation. Our Constitution, on the other hand, provides for the contingencies of growth in the public sentiment only by amendments to the Constitution. These amendments require more than a majority of all the political forces represented in Congress; and Mr. Calhoun, foreseeing that a collision must eventually occur between the two sections, carried with him, not only the South, but a considerable minority of the North, in resisting any attempt to limit the _extension_ of slavery. On this point the passions and principles of the people of the slave-holding and the majority of the people of the non-slave-holding States came into violent opposition; and there was no possibility that any amendment to the Constitution could be ratified, which would represent either the growth of the Southern people in their ever-increasing belief that negro slavery was not only a good in itself, but a good which ought to be extended, or the growth of the Northern people in their ever-increasing hostility both to slavery and its extension. Thus two principles, each organic in its nature, and demanding indefinite development, came into deadly conflict under the mechanical forms of a Constitution which was not organic.