The problem, theory and quantitative statistical analysis -- World-wide differences in national structures of economic inequality : some basic facts and their view in economics and sociology -- Ethnic differentiation, stratification and conflicts in the world today -- Ethnic stratification and economic inequality : theory and hypotheses -- Complementary epistemological approaches -- Income inequality as a result of ethnic heterogeneity and ethno-class exploitation : macro-level quantitative and qualitative analyses -- Historical-comparative analysis and case studies -- The prevention and the emergence of ethnic differentiation and stratification : a sociological-historical typology -- Two roads toward egalitarianism in ethnic homogeneous societies : Sweden and Japan -- State socialism as a silver bullet against inequality? : how ethnic-national cleavages and conflicts affected the rise and fate of communist systems -- The ethnic hierarchy : India's caste system in comparative perspective -- Coloured class structures: Brazil and Hispanic America -- Ethno-class regimes : the origins and forces sustaining glaring economic inequality in sub-Saharan Africa -- "Separate, but equal" : the characteristics, origins, and aftermaths of apartheid systems -- Preconditions and perspectives for peace and equality in ethnically differentiated societies : political implications and conclusions -- References.