Eli Whitney is an american inventor. Some of his best known inventions were the cotton gin, developing the concept of mass production and interchangeable parts, and milling machines. His cotton gin became a major success, besides the purpose of why it was made, which was to have plantation owners have less slaves. The cotton gin removed the seeds from the cotton balls, allowing the south to become the major producer of cotton. He was born December 8th, 1765 and died on January 8th, 1825.