The United States population has always been a culturally, ethnically and racially diverse and versatile one. Being home to more immigrants than all other countries on the planet combined, the North American superpower has seen a steady population growth for decades now. The number of permanent US residents has increased several times during the 20th century alone – from approximately 76 million in 1900 to more than 310 million in 2010. This tendency has significantly changed the face of the country''s society. Hispanic, Asian and African Americans have become influential minority groups, forever altering the demographical outlook. In order to find out more about the United States demographics, its main groups, development and changes – read this book.