"The USA is the world's foremost economic and military power, with global interests and an unmatched global reach. America's gross domestic product accounts for close to a quarter of the world total, and its military budget is reckoned to be almost as much as the rest of the world's defence spending put together. The country is also a major source of entertainment: American TV, Hollywood films, jazz, blues, rock and rap music are primary ingredients in global popular culture. The United States originated in a revolution which separated it from the British Crown. The constitution, drafted in 1787, established a federal system with a division of powers which has remained unchanged in form since its inception. People from all over the globe still try make the U.S. their home... The U.S. contains a highly diverse population, the product of numerous and sustained waves of immigration. Ethnic and racial diversity - the "melting pot" - is celebrated as a core element of the American ideology. The 1964 Civil Rights Act outlawed racial and other discrimination... U.S. foreign policy has often mixed the idealism of its 'mission' to spread democracy with the pursuit of national self-interest. Given America's leading role on the international stage, its foreign policy aims and actions are likely to remain the subject of heated debate and criticism, as well as praise."