What are some of the factors that cause europe to be one of the most densely populated areas of the world?

There are various reasons for that, for easiness I will list them in points:
#1 Technological development
#2 Employment opportunities
#3 Infrastructural development at high rate
#4 Various tourist areas
#6 City of famous football player(might be a cause)
#7 Natural beauty probably

Hope you like this answer

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.

Answer islamic scholars made advancements in technology, literature, philosophy, mathematics, astronomy, and the arts during this time period;