The economic collapse of the soith happened rapidly from tge result of the war. Many states went into debt to the US government as a result. Now a few years after the war the south started rebuilding and led to a industral revolution. Many of the southerners who could not find work, went and worked for the rail roads as well.
Because in the time before the 19th amendment many people thought that woman were incapable so they shouldn't have the write to choose the nations leaders.
Alfred Thayer Mahan was a United States naval officer, historian, and one of the most influential American authors of the nineteenth century.
He argued that modern navies needed repair and coaling stations, which would not be dependable if controlled by other nations. This reasoning implied a justification for American acquisition of colonies to develop port facilities throughout the world.
Japan was able to recover so fast due to the Korean War. There was a huge surge of United Nation and United States troops that provided money and jobs. Japan was able to serve as a repair hub as well as a logistics base during that time.