In the USA, continuous mass immigration has been a feature of economy and society since the 19th century. Multiculturalism has become an issue for businesses as non-white people address how to meet the needs of a workforce that is increasingly more diverse but not that doesn't always understand the differences that occur between cultures.

Immigrants contribute to the american culture and development by starting their own business related with their culture for example places like Chinatown or Little Italy.

African Americans have lagged behind whites and other ethnic groups for centuries and the gap just keeps on getting bigger. With President Barack Obama in the White House maybe it will change. Only the fact of American citizens electing Barack Obama for president shows a change of mentality of the people.