Book excerpt: Through diversity, America has grown strong as a nation. Although all segments of the population share certain life patterns and basic beliefs, there are many differences in traditional lifestyles and cultures among ethnic groups. Respect for such differences is a benchmark of a democratic nation. Migrants, Immigrants, and Slaves documents the fact that all American ethnic groups have been both the oppressed and the oppressors. The book is written for introductory American history, ethnic studies, and sociology courses. Special attention is given to the immigration patterns and cultural contributions of more than 50 ethnic groups.