Research clearly indicates that ethnic groups differ significantly on levels of mental and physical health, antisocial behavior, and educational attainment. This book explains these variations with respect to their psychological and social functioning and tests competing hypotheses about the mechanisms that might cause the functioning to differ in pattern from other groups. Attention is paid to educational attainments, antisocial behavior, schizophrenia and suicide, and to the complex and changing patterns of ethnic identity. The book concludes with a discussion of the multiple meanings of ethnicity, the major variations among ethnic groups, and policy implications.