Andrew Carnegie founded the Bessemer Process, which quickened the steel making process. He also used Vertical Integration to corner the steel market.
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The leader of a caliphate is called the caliph, meaning deputy or representative. All caliphs are believed to be the successor to Prophet Muhammad. Muhammad was not a caliph; according to the Quran he was the last and greatest of the prophets. That means no one can replace Muhammad as the messenger of God. So true. I hope this helps
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