The countries of Europe can be grouped according to different criteria. The most common is grouping by population, by the size of GDP per capita. By the size of the state budget, by the duration of highways, or railways. Yes, whatever. For example, you can countries by the number of cities, by the number of people employed in agriculture, and so on. Thus, classifications and criteria for sorting can be found very much, depending on how to classify.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.