This last class was at that time a dominant majority and for long afterwards it exercised a controlling and restraining influence over all the rest. It included men at the South who earnestly desired the extinction of slavery, and other men at the South who were sincerely convinced that the slave system was absolutely necessary to the cultivation of Southern fields and that its perpetuation was justified by the incurable inferiority of the black race, and the hopeless incapacity of the negro for freedom and self-government. At the North the class of those who cared more for the perpetuity of the Union than for either the extinction or the perpetuation of slavery included men of every shade of belief as regarded slavery itself, except the extreme opponents of the system. It included such men as Abraham Lincoln who, even after the war was on, persisted in holding to his heart as his supreme desire the perpetuity of the Union in order, as he splendidly phrased it in his Gettysburg speech, that "Government of the people by the people and for the people might not perish from the earth." It was a magnificent conflict of human forces. Incidentally it brought into play passion, prejudice, malice, groveling self-interest and brutal disregard of others' rights and feelings. But in large part it was dominated, on the one side and upon the other, by a love of liberty, an instinct of justice and an exalted patriotism that did honor to those who were so inspired. All these sentiments and aspirations were variously directed, giving rise sometimes to contradictory courses of action. But he who would understand and interpret the events of that time must fully conceive the fact that the inspiring impulses of the great majority were essentially and fundamentally the same on both sides, however variously they may have been interpreted into conduct. Only thus shall we understand how it was that men on opposite sides of a geographical line, men equally loving liberty and equally holding in reverence the traditions of the American Union, fell a-fighting in 1861 and for four years waged the bloodiest and most devastating war of which modern history anywhere makes record. The controversy with respect to California and the territories was only a part of the disturbing influences of the middle of the nineteenth century.