A. Americans wanted to protect their land
The three most prominent factors that contribute to Africa's lack of economic and human development are corrupt governments, a lack of material resources, and tribal warfare. All of these are somewhat intertwined. <span />
Because United States of America is not a world country
Peter the Great established St. Petersburg, his window on the west. He spread his ideas of westernization, and expanded the country.
He also established beard laws, you had to pay a tax in order to keep your beard (not necessarily positive though)