# Letters on American Slavery/Letter 6

LETTER FROM M. PASSY.
Humanity is governed by laws which continually impel it to extend, without ceasing, the sphere of its knowledge. There is no discovery which does not conduct it to new discoveries; each generation adds its own to the mass which it has received from the past, and thus from age to age are the strength and riches of civilization augmented.
Now it is one of the numerous proofs of the benevolent purposes of the Creator, that every step of mental progress strengthens the ideas of duty and justice, of which humanity makes application in its acts. Human society, as it gains light, does not merely learn thereby the better to profit by its labors. It gains, at the same time, clearer and surer notions of moral order. It discerns evil where it did not at first suspect its existence; and no sooner does it perceive the evil than it seeks the means to suppress it.
This is what, in our day, has awakened so much opposition to Slavery. Thanks to the flood of light already received, society begins to comprehend, not only its iniquity in principle, but all the degradation and suffering it scatters in the lands where it exists. A cry of reprobation arises, and associations are formed to hasten its abolition.
We may, without fear, assert that it will be with Slavery as with all the other remnants of ignorance and original barbarism. The day will come when it must disappear, with the rest of the institutions which have been found inconsistant with the moral feelings to which the development of human reason gives the mastery.
Let those reflect who, at this day, constitute themselves the defenders of Slavery. They have against them the most irresistible of all powers—that of moral truth becoming more and more distinct—that of human conceptions necessarily rising with the growth in knowledge of the divine will. Their defeat is, sooner or later, inevitable.
How much wiser would they be, did they resign themselves to the preparation for a reform, the necessity for which presents itself with such inflexible urgency. It is, doubtless, a work of difficulty. Freemen require other conditions than ​those to which they were subjected by the lash; but the requisite changes may be effected. Wise precautions and temporary arrangements, united with the injunctions of authority, will not fail of success. Proprietors who dread emancipation! show to your people a little of that benevolence which so promptly subdues those who are unaccustomed to it, and you will find them docile and industrious as freemen. It is Slavery which corrupts and deteriorates the faculties which God has given to all for the amelioration of their destinies and the enjoyment of existence. Liberty, on the contrary, animates and develops them. Human activity rises to extend its conquests, more ingenious and energetic at her reviving breath.
May such assertions as these, conformable as they are to the experience of all ages, no longer meet in America the contradictions which are long extinct in Europe. May those States of the Union where Slavery still counts its partizans, hasten to prepare for its abolition. Storms are gathering over the seat of injustice. Prosperity, gained at the expense of humanity, flows from a source which time will necessarily dry up. There can exist no durable prosperity on earth, but in consistency with the laws of God; and his laws command men to love and serve each other as brethren.
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