We can all agree that slavery is America's original sin and its legacy burdens all people to this very day. Our job as human beings is to advance understanding and tolerance for all, listening before talking, and studying history for proper perspective on evolution from the horrible mistreatment of African Americans. But it's no longer 1865 or 1919 or 1965 or even 2018. The improvement of the human condition is an ever-moving upgrade. In spite of persistent complaints by some about life in America, most people appreciate the opportunities that freedom, expanding understanding, and capitalism offer. The Courier-Journal's most seasoned investigative reporter dug into 100-year-old newspaper files to present a more complete picture of Gen. John B. Castleman. The Civil War general