I have always thought that all men should be free; but if any should be slaves, it should be first those who desire it for themselves, and secondly, those who desire it for others. When I hear anyone arguing for slavery, I feel a strong impulse to see it tried on him personally.
— Abraham Lincoln, Statement to an Indiana Regiment passing through Washington (17 March 1865)
The stark, and dreadful image is of a slave auction block.
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