inequalities among children?

Why are there inequalities among children?
---I think this can be attributed to two mian resons,ethnid discriminant and income inequality!
Accounts by journalists of wars in several countries of sub-Saharan Africa in the 1990s have raised concern that ethnic cleavages and overlapping religious and racial affiliations may widen the inequalities in health and survival among ethnic groups throughout the region, particularly among children.
Susan Mayer, Associate Professor in the Harris Graduate School of Public Policy Studies, has devoted most of her academic career to researching the causes and consequences of economic inequality in the United States. She has especially focused on the importance of inequality for children.Her most recent research focuses on how economic inequality, which dramatically increased between 1970 and 1990, affects children’s educational attainment.Mayer was surprised to find that the effects of inequality are more often due to the effect of other people’s income rather than the individual income level of a household. As the rich have gotten richer, they benefit from positive interpersonal comparisons, while the poor suffer from negative comparisons.