What would be one small detail that, if changed, might change the outcome of the story.

In the book The Civil War: Moments in History Possibly, if the south agreed to free all the slaves as the northerners wanted,  the Civil War may not have happened. If it did not happen, it would have changed many people's lives It would change not only the lives of many slaves, but many people who were killed in the war would not have died.  Other people may not have been poor or starve to death.  President Lincoln's life may have even been saved. This one disagreement in history, caused so many problems.