According to Deonarain, the 2000 flood in Mozambique was responsible for the deaths of 800 people, affected 1 million people who are currently below the poverty line and destroyed the agricultural industry in this country. Thus, such calamities have harmed Africa's workforce, reduced the country's productivity, and harmed its economy (paragraph 5). In addition, the climate brings diseases to Africa, which this poor continent is unable to cure a large group of people and leads to high mortality rates, so “it cannot invest in the production of such capital” . However, these diseases often cause families in Africa to often give birth to more children, however, they have too many that they cannot afford sufficient education, which would make every citizen in Africa less productive than in other places and become poorer (Pathe , paragraph 14). In contrast, the reasons why the United States of America contains the most productive society is due to “immigration and talent” (Why American is so Rich, paragraph 7). In other words, since America always recruits numerous talented immigrants from all over the world and facilitates them in the American environment of freedom to express creative ideas, America's productivity gradually develops and its economy is able to keep the most powerful in