Page:The rise, progress, and phases of human slavery.djvu/107

 place in the world, save in the three first ages of Christianity. And no sooner did the pagan masters and hypocritical Christians discover, under Constantine, that more work could be got out of "free" proletarians than out of chattel-slaves, and that the former need not while the latter must be kept, than they, too, became abolitionists upon the same principle.