Even the slaves, who worked the fields, were said to be content. The poor whites were barely visible until the vigilante movement after the Civil War. They formed secret societies such as the Klan to terrorize the black community and to acquire political power. The first three sentences deal with the legend of the Old South. But in sentence 4, the writer shifts to poor whites.
Poor whites is contrary to timeless beauty.
Unity is disrupted. The remaining sentences build on the allusion to the vigilante movement. Focus of the paragraph shifts to the Ku Klux Klan. The paragraph lacks unity. Read the following paragraph, checking for unity by marking shifts in focus.