The United States, comprising 50 states, a federal district, and self-governing territories, is the third-largest country by area and population. As a highly developed nation, it ranks among the top in socioeconomic measures like average wage, human development, and GDP per capita. Despite having only 4.3% of the global population, the U.S. holds 33.4% of the world’s wealth, the largest share in any country. Known for its history of immigration, the U.S. is a top destination for international students, with about half of the world’s top 50 universities located within its borders.