The inhumanity of the slave trade was the great and, finally, triumphant argument by which it was proved to be inconsistent with Christianity.

The advocates of slavery, like the advocates of war, resorted to the Old Testament for support; but it appeared that slavery, as it appears that war, was permitted and approved of for reasons and on principles peculiar to the ancient economy. This is apparent as well from the difference between the general design of the old and new dispensations as from the whole genius and spirit of the gospel. Hence those who opposed the slave trade argued from the general nature and spirit of Christianity as the strongest ground which could be taken. If slavery was inconsistent with this, it ought not to be tolerated; but slavery is inhuman and is therefore inconsistent with Christianity. Exactly the same is true of war, nor can anything short of an express revelation from God, commanding war or slavery, render either of them justifiable.

It deserves to be distinctly considered that the gospel contains little or nothing directly by way of precept against slavery; but slavery is inconsistent with its general requirements and inculcations and is therefore wrong. But war, besides being inconsistent with the genius and spirit of the gospel, is prohibited by those precepts which forbid retaliation and revenge and those which require forgiveness and good will.

It is plain, then, that he who does not advocate and defend the slave trade, to be consistent, must grant that war is incompatible with Christianity, and that it is a violation of the gospel to countenance it.

WAR IS UNWISE

That the principles and practice of war are unwise I argue:

I. BECAUSE, INSTEAD OF PREVENTING, THEY PROVOKE INSULT AND MISCHIEF

The maxim, that in order to preserve peace, mankind must be prepared for war, has become so common, and sanctioned by such high authority, that few question its wisdom or policy; but if stripped of its specious garb, it may appear to proceed not from that wisdom which came down from above, which is “first pure, then peaceable, gentle, easy to be entreated, full of mercy and good fruits, without partiality, and without hypocrisy”; and if it is not the wisdom from above, then it must be the wisdom from beneath.

Are not pride, avarice, and revenge the seeds of all kinds of carnal warfare? From these grow all the quarreling among children, the discord among families, the bickerings, law suits, and broils among neighbors, the boxing among bullies, the dueling among modern gentlemen, and wars among nations. They all originate from one and the same spirit.