How did the conclusion of the Civil War affect the future of the U. S.?

The outcome of the Civil War resulted in a strengthening of U.S. foreign power and influence, as the definitive Union defeat of the Confederacy firmly demonstrated the strength of the United States Government and restored its legitimacy to handle the sectional tensions that had complicated U.S. external relations

The Civil War confirmed the single political entity of the United States, led to freedom for more than four million enslaved US , established a more powerful and centralized federal government, and laid the foundation for US emergence as a world power in the 20th century

well considering i can't see the graph, it's probably prices

earthquake fault lines