I don't care for capitalism, but Adam Smith was an abolitionist. He absolutely hated slavery because he believed it to be immoral firstly, and economically inefficient secondly. He couldn't prove the second part, but once someone at either Cambridge or Oxford did manage to prove it, Great Britain and Europe outlawed slavery. Again, I'm not defending capitalism here, and I'm certain, from the tone of The Theory of Moral Sentiments, that, were he alive today, Smith would be railing against Capitalism. I'm just pointing out that it was supposed to be abolished far quicker than The Civil War.