The threats of the 20th century were not that specific. Unless you lived in a particularly sheltered part of the world, your neighbors (the people you knew) wer

The threats of the 20th century were not that specific. Unless you lived in a particularly sheltered part of the world, your neighbors (the people you knew) were the threat. They supported a different world order, and if the right (or wrong) situation arose, they were often ready to kill you to further their goals. Capitalism, industrialization, and urbanization had left many people behind. Communism and fascism arose as responses to that, along with more moderate ideologies that ended up joining forces with capitalism. Today we have globalization and a different flavor of capitalism, with a new set of ideologies offering solutions to those who were left behind.