United States has the largest and the most technologically advanced economy in the world. Since the second half of the twentieth century, United States has emerged as the sole superpower in the world both military and economically. This has been fueled by different factors but most important has been capitalist economy that allows private investors to flourish with very little intervention from the government except in provision of policy framework. United States was the first country to embrace marketed oriented economy with private individuals and business firms playing a key role in the economy while the federal government provides the framework for the economy. Its per capital GDP of $46,900 is the highest in the world which means Americans can be considered to have an average better life than other people.