What is the most appropriate base for measuring the development of a country?

Explanation

Usually we take one or more important characteristics of persons and compare them based on these characteristics.
`1`.There may be differences about what are important characteristics that should form the basis of comparison: friendliness and spirit of cooperation, creativity or marks secured.
`2`.Similarly in the case of development, for comparing countries, their income is considered to be one of the most important attributes.
`3`.Countries with higher income are more developed than others with less income. This is based on the understanding that more income means more of all things that human beings need. With greater income, people can have whatever they like.