Because countries like the U. S. and trace their culture roots to this part of Europe

countries like the U.S. and England  trace their culture roots to Greece.

Explanation:

A lot of cultural values that currently held by western civilizations was originated from ancient Greece. They were the first people that first introduced the concept of Democracy which gave the people with the power to influence the government.

The spread of Greece's cultural value was accelerated with the help of Roman empire. After learning the cultural values from the Greek , People from Rome managed to conquered the vast majority of Europe. They spread the culture to the conquered area throughout the process. Since US was colonized by European countries, the culture got spread in north American territory too.

glass wants to live in a world of super heroes and villains. he have lived all his life trying to be responsible for the creating the origin story of a super hero; he schemed and caused many incidents (many of them fatal) hoping that someday someone with superpowers would show up and save the day.

he knew himself very much. he saw himself as a villain of a real-life super hero story. he was aware of his strengths (more than smart enough for being manipulative and scheming) and weaknesses (having fragile bones and having to rely on his mind to succeed).