When Louisiana was acquired by the United States, it was an acquisition not less to the North than to the South; for while it was important to the country at the mouth of the river Mississippi to become the emporium of the country above it, so also it was even more important to the whole Union to have that emporium; and although the new province, by reason of its imperfect settlement, was mainly regarded as on the Gulf of Mexico, yet in fact it extended to the opposite boundaries of the United States, with far greater breadth above than below, and was in territory, as in everything else, equally at least an accession to the Northern States. It is mere delusion and prejudice, therefore, to speak of Louisiana as acquisition in the special interest of the South. The patriotic and just men who participated in that act were influenced by motives far above all sectional jealousies. It was in truth the great event which, by completing for us the possession of the Valley of the Mississippi, with commercial access to the Gulf of Mexico, imparted unity and strength to the whole Confederation and attached together by indissoluble ties the East and the West, as well as the North and the South. As to Florida, that was but the transfer by Spain to the United States of territory on the east side of the river Mississippi in exchange for large territory which the United States transferred to Spain on the west side of that river, as the entire diplomatic history of the transaction serves to demonstrate. Moreover, it was an acquisition demanded by the commercial interests and the security of the whole Union. In the meantime the people of the United States had grown up to a proper consciousness of their strength, and in a brief contest with France and in a second serious war with Great Britain they had shaken off all which remained of undue reverence for Europe, and emerged from the atmosphere of those transatlantic influences which surrounded the infant Republic, and had begun to turn their attention to the full and systematic development of the internal resources of the Union. Among the evanescent controversies of that period the most conspicuous was the question of regulation by Congress of the social condition of the future States to be founded in the territory of Louisiana.