The Columbian Exchange is a extensive exchange of plants, culture, communicable disease, human populations and the ideas between the Afro-Eurasian hemispheres and the Americans following the voyage to America by Christopher Columbus in the year 1942. This term was introduced in the year 1972 by Alfred W. Crosby. The communication between the two places disseminated a variety of livestock and new crops which resulted in the increase in the population in both the areas. Explorers had returned to Europe with tomatoes, maize and potatoes which became the essential crops in the European countries by the 18^th century.  On the other hand, the Europeans have introduced peanut and manioc to the tropical places of West Africa and Asia where they had initiated and supported the growth in populations on soils that would not have produced large yield otherwise. Mercantilism eliminated the free trade by promoting the governmental regulations of the economy in order to enhance state power which defined the policies of the economy of the colonizing countries in Europe. Due to the expansion of the European market into the colonial sphere, the profitability of that place has enhanced over the time. The philosophy of Mercantilism has shaped the perception of the economy of Europe between 1500s to 1700s. Mercantilism held that only a limited quantity of gold and silver bullion termed as wealth existed in the world. The world economy in order to gain power, had to accumulate gold and silver by the process of mining these raw materials available on the earth from their colonial possessions. The Mercantilists did not have faith in arguing and free trading. They believed in controlling trade in the nations for creating more wealth in order to enhance state power. In this regard, the existing colonies started strengthening the colonizing nations of Europe.