The main point of the excerpt is that readers should be aware of the damage that the war has done to a generation of men who were impacted by it, and read the book with this idea in mind.
The epigraph wants to make sure that readers who approach this book do it with the same purpose as the one with which the author wrote it. He does not want the readers to think of this book as an accusation, a confession or an adventure.
Explanation:
He was from Venezuela and at one time was the President of Gran Colombia. He also made sure to keep his promise of freeing the slaves in Spanish America in 1816. He left the presidency in 1930 and died the same year. His tragedy was that he had became a dictator after years of political turmoil. Hope it helps
South wanted slavery, rebellions because of Lincoln becoming president, John Brown's and other abolitionists actions, the consequences caused by Compromise of 1850, the consequences of the Fugitive Slave Act, and the controversy and Bleeding Kansas.