The United Nations measures the level of human development of its member countries in its "Human Development Index" (HDI). This index is regarded as the standard measure for the well-being of people (especially children), and it incorporates measures of poverty, literacy, education, life expectancy. It is published regularly as part of the Human Development Report. Presumably, countries with a low HDI would be the ones in most need of humanitarian aid, and those with high HDI numbers would not need much, if any.