Thus wars, contemplated in a philosophical aspect, in spite of their repulsiveness are invested with dignity, and really indicate great moral and intellectual movements, as well as the personal ambition or vanity of conquerors. They are the ultimate solutions of great questions, not to be solved in any other way,-- unfortunately, I grant,--on account of human wickedness. And I know of no great wars, much as I loathe and detest them, and severely and justly as they may he reprobated, which have not been overruled for the ultimate welfare of society. The wars of Alexander led to the introduction of Grecian civilization into Asia and Egypt; those of the Romans, to the pacification of the world and the reign of law and order; those of barbarians, to the colonization of the worn-out provinces of the Roman Empire by hardier and more energetic nations; those of Charlemagne, to the ultimate suppression of barbaric invasions; those of the Saracens, to the acknowledgment of One God; those of Charles V., to the recognized necessity of a balance of power; those which grew out of the Reformation, to religious liberty. The Huguenots' contest undermined the ascendency of Roman priests in France; the Seven Years' War developed the naval power of England, and gave to her a prominent place among the nations, and exposed the weakness of Austria, so long the terror of Europe; the wars of Louis XIV. sowed the seeds of the French Revolution; those of Napoleon vindicated its great ideas; those of England in India introduced the civilization of a Christian nation; those of the Americans secured liberty and the unity of their vast nation. The majesty of the Governor of the universe is seen in nothing more impressively than in the direction which the wrath of man is made to take. Now these remarks apply to the Crusades. They represent prevailing ideas. Their origin was a universal hatred of Mohammedans. Like all the institutions of the Middle Ages, they were a great contradiction,--debasement in glory, and glory in debasement. With all the fierceness and superstition and intolerance of feudal barons, we see in the Crusades the exercise of gallantry, personal heroism, tenderness, Christian courtesy,--the virtues of chivalry, unselfishness, and magnanimity; but they ended in giving a new impulse to civilization, which will be more minutely pointed out before I close my lecture.