Didn't the industrial revolution make slavery less economical before governments took action?
Specifically where? As I understand it, the U.S. was unique in requiring a bloody civil war to "end slavery". Quotes because I don't think that's why the U.S. fought a bloody civil war.
You are absolutely correct.
The civil war was not about ending slavery. It was to supposedly "Save The Union". Abolition was a by product.
Lincoln wrote to Joshua Speed in 1855:
How can any one who abhors the oppression of negroes, be in favor of degrading classes of white people? Our progress in degeneracy appears to me to be pretty rapid. As a nation, we began by declaring that "all men are created equal." We now practically read it "all men are created equal, except negroes." When the Know-Nothings get control, it will read "all men are created equal, except negroes, and foreigners, and catholics." When it comes to this I should prefer emigrating to some country where they make no pretence of loving liberty — to Russia, for instance, where despotism can be take pure, and without the base alloy of hypocracy
Lincoln wrote a letter in response to an editorial by Horace Greeley of the New York Tribune which had urged complete abolition:
I would save the Union. I would save it the shortest way under the Constitution. The sooner the national authority can be restored; the nearer the Union will be "the Union as it was." If there be those who would not save the Union, unless they could at the same time save slavery, I do not agree with them. If there be those who would not save the Union unless they could at the same time destroy slavery, I do not agree with them. My paramount object in this struggle is to save the Union, and is not either to save or to destroy slavery. If I could save the Union without freeing any slave I would do it, and if I could save it by freeing all the slaves I would do it; and if I could save it by freeing some and leaving others alone I would also do that. What I do about slavery, and the colored race, I do because I believe it helps to save the Union; and what I forbear, I forbear because I do not believe it would help to save the Union. I shall do less whenever I shall believe what I am doing hurts the cause, and I shall do more whenever I shall believe doing more will help the cause. I shall try to correct errors when shown to be errors; and I shall adopt new views so fast as they shall appear to be true views.
I have here stated my purpose according to my view of official duty; and I intend no modification of my oft-expressed personal wish that all men everywhere could be free.
Lincoln wrote to James C. Conkling on August 26, 1863:
There was more than a year and a half of trial to suppress the rebellion before the proclamation issued, the last one hundred days of which passed under an explicit notice that it was coming, unless averted by those in revolt, returning to their allegiance. The war has certainly progressed as favorably for us, since the issue of proclamation as before. I know, as fully as one can know the opinions of others, that some of the commanders of our armies in the field who have given us our most important successes believe the emancipation policy and the use of the colored troops constitute the heaviest blow yet dealt to the Rebellion, and that at least one of these important successes could not have been achieved when it was but for the aid of black soldiers. Among the commanders holding these views are some who have never had any affinity with what is called abolitionism or with the Republican party policies but who held them purely as military opinions. I submit these opinions as being entitled to some weight against the objections often urged that emancipation and arming the blacks are unwise as military measures and were not adopted as such in good faith.
You say you will not fight to free negroes. Some of them seem willing to fight for you; but, no matter. Fight you, then exclusively to save the Union. I issued the proclamation on purpose to aid you in saving the Union. Whenever you shall have conquered all resistance to the Union, if I shall urge you to continue fighting, it will be an apt time, then, for you to declare you will not fight to free negroes.
I thought that in your struggle for the Union, to whatever extent the negroes should cease helping the enemy, to that extent it weakened the enemy in his resistance to you. Do you think differently? I thought that whatever negroes can be got to do as soldiers, leaves just so much less for white soldiers to do, in saving the Union. Does it appear otherwise to you? But negroes, like other people, act upon motives. Why should they do any thing for us, if we will do nothing for them? If they stake their lives for us, they must be prompted by the strongest motive—even the promise of freedom. And the promise being made, must be kept.
Lincoln stated in a October 16, 1854 speech that:
My first impulse would be to free all the slaves, and send them to Liberia,—to their own native land. But a moment’s reflection would convince me that whatever of high hope (as I think there is) there may be in this, in the long run, its sudden execution is impossible.
In analyzing Lincoln's position, historian Eugene H. Berwanger notes:
During his presidency, Lincoln took a reasoned course which helped the federal government both destroy slavery and advance the cause of black suffrage. For a man who had denied both reforms four years earlier, Lincoln's change in attitude was rapid and decisive. He was both open-minded and perceptive to the needs of his nation in a postwar era. Once committed to a principle, Lincoln moved toward it with steady, determined progress.