Isabella I of Castile

The Columbian Exchange was a work written by Dr. Alfred Crosby in 1972. He wrote it after studying the Western Hemisphere a century after Christopher Columbus came to the Caribbean. In the work Crosby pointed out that there was four changes between the Europeans and the Native Americans. Some of the exchanges where good which included the exchange plants and animals. There was also exchanges that were harmful to both the Europeans and the Native Americans these would have the exchange of…