What does the Human Development Index tell us?

The Human Development Index (HDI) was created to emphasize that expanding human choices should be the ultimate criteria for assessing development results. Economic growth is a means to that process but is not an end in itself. The HDI can also be used to question national policy choices, asking how two countries with the same level of Gross National Income (GNI) per capita can end up with different human development outcomes.
For example, Turkey has GNI per capita higher than Chile, but in Turkey, life expectancy at birth is almost four years shorter, mean years of schooling is 2.3 years than in Chile, resulting in Chile having a higher HDI value than Turkey. These contrasts can stimulate debate about government policy priorities.