Joseph condemns slavery in a letter to Bennett.
Joseph Smith, Letter to John C. Bennett, March 7, 1842, in Times and Seasons (March 15, 1842), The Joseph Smith Papers website, accessed April 27, 2021
"Respected Brother:—I have just been perusing your correspondence with Doctor Dyer on the subject of American Slavery, and the students of the Quincy Mission Institute, and it makes my blood boil within me to reflect upon the injustice, cruelty, and oppression, of the rulers of the people—when will these things cease to be, and the Constitution and the Laws again bear rule? I fear for my beloved country—mob violence, injustice, and cruelty, appear to be the darling attributes of Missouri, and no man taketh it to heart! O, tempora! O, mores! What think you should be done?"