On the other, the words of the Constitution throughout imply that the United States constitute more than a league--a nation; and the money power was lodged in the lower house of Congress, elected by the people of the nation, according to their population. The opposing ideas regarding the powers of the States and of the government, respectively, gave rise to the two first political parties, the Federalist and the Republican; and these have had as successors parties which have fought the same battle over and over again. The later Whigs and Republicans, on the one hand, and the Democrats, on the other, have usually been the champions, respectively, of a strong central government, and of State rights. The older Democrats insisted on a strict construction of the Constitution, and opposed the undertaking of internal improvements and the maintenance of a national bank by the general government; and for the first sixty years of this century the State rights principle prevailed in national policy with little interruption. [Sidenote: Rights of the States.] [Sidenote: Tendency towards Centralization.] It happened that the social institution and evil of slavery, which had become confined to the Southern States, needed the defence of the doctrine of State rights for its continuance. Nullification, in 1833, and secession, in 1861, were the ultimate conclusions of that doctrine, practically applied for the purpose of sustaining the system of human bondage. A State had a right, it was said, to break her "compact" with the Union; and the Southern States, following in the line of this doctrine, did attempt to secede in order to maintain slavery. The war which followed was the rock upon which the doctrine of State rights split. The tide at once turned towards a strong central government. Extraordinary powers, civil, military, and financial, were exercised to put down the rebellion; and some of these powers, once assumed by the general government, have been continued to this day. They have been greatly strengthened by the enormous patronage which has accumulated in the hands of the Executive; by the army of office-holders which, scattered through the land, is subject to the influence of the central power. [Sidenote: Results of Emancipation.] [Sidenote: The Fifteenth Amendment.]