The United States of America is one of the world’s most diverse and powerful nations. The third largest country in the world by land area and population, the USA has experienced rapid growth and prosperity since its official founding in the 18th century. The USA’s affluence is largely due to the intense expansion of its productive population, which can be directly linked to mass immigration. An estimated 14 million immigrants settled in the USA between the years 2000 and 2010, making the USA the most popular migration destination in the world.