http://voteview.com/images/carnegie.gifBought the rights to cheaply mass producing steel. Had a major impact on the Industrilization in America. Due to his steel being so cheap and there being such a surplus of it, he pretty much was the entire steel industry as people couldn't compete with him. Steel was used for building skyscrapers among other things.
Ended in 1899. Brought around 100,000 prospectors the the klodike mountain in hopes for gold. Only the first propectors there and companies selling equipment benefitted from this leaving the majority in poverty.