There is power,wealth,racial and ethnic inequality 。 Minority people have been excluded by formal and informal barriers from full participation in American life. 。 Race and ethnic relations have been a major concern and source of unrest and tension. Racial Riots in Los Angeles• There is power, wealth, racial and ethnic inequality. • Minority people have been excluded by formal and informal barriers from full participation in American life. • Race and ethnic relations have been a major concern and source of unrest and tension. Racial Riots in Los Angeles