Measuring human development
Development can have different meanings, and there are also many different ways of measuring it.
A well-known one is called the Human Development Index which consists of three variables; education, life expectancy and some measure of an average income. With these variables, we can track the progress or the lack thereof made by different countries.
Most countries in Western Europe have high levels of human development. Poorer countries, mainly in Africa, have very low levels of human development.
These variables will be discussed in the next step.