Advancement - improvement in condition - is the order of things in a society of equals. As Labor is the common burthen of our race, so the effort of some to shift their share of the burthen on to the shoulders of others, is the great, durable, curse of the race. Originally a curse for transgression upon the whole race, when, as by slavery, it is concentrated on a part only, it becomes the double-refined curse of God upon his creatures.