In 1620, three months before the landing of the _Mayflower_ at Provincetown, a Dutch vessel carried African slaves up the James River, and on the soil of Virginia there was planted a system of servitude which at last extended throughout the Colonies and flourished with increasing vigor in the South, until, in the War of the Rebellion, Abraham Lincoln's Emancipation Proclamation put an end forever to slavery in America. When the builders of our Government met in the Constitutional Convention of 1787, slavery was a problem which more than once threatened to wreck the scheme for an indissoluble union of the States. But it was compromised under a suggestion implied in the Constitution itself, that slavery should not be checked in the States in which it existed until 1808. In the meantime the entire labor system of the South was built upon African slavery, while at the North the horror of the public conscience grew against the degrading institution from year to year. By 1854 the men in the free States who were opposed to slavery had begun to unite themselves by political bonds, and in the spring and summer of that year, groups of such men met in more or less informal conferences in Wisconsin, Michigan, New York, Maine, Massachusetts, Iowa, Ohio, and other northern States. But it was at Jackson, Michigan, where the men who were uniting their political fortunes to accomplish the destruction of slavery first assembled in a formal convention on July 6, 1854, nominated a full State ticket, and adopted a platform containing these declarations: Resolved: That, postponing and suspending all differences with regard to political economy or administrative policy, in view of the imminent danger that Kansas and Nebraska will be grasped by slavery, and a thousand miles of slave soil be thus interposed between the free States of the Atlantic and those of the Pacific, we will act cordially and faithfully in unison to avert and repeal this gigantic wrong and shame. Resolved: That in view of the necessity of battling for the first principles of Republican government, and against the schemes of an aristocracy, the most revolting and oppressive with which the earth was ever cursed or man debased, we will cooeperate and be known as "Republicans" until the contest be terminated.