Thomas edison contributed to society by
creating an effective steam engine
pioneering research on radioactivity
developing the phonograph and motion camera
discovering vaccination and microbial fermentation

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c.developing the phonograph and motion camera

The statistics for the eastern war are grim. more than three-million men died in the fighting, more than nine-million men were wounded, and every major country which participated lost its form of government.

Jackson  said nullification 'means insurrection and war,' and called it a treasonous attack on america. the second aspect of the  force bill  was the passing in congress of a lower tariff in 1833. this was offered as a compromise to avoid conflict with south carolina, and to attempt to defuse the tense situation.source google