You have all these people in the city and everything has become centralized. If you live outside the city and you need a birth certificate or some official paper from the government, you have to travel to the city.
It's impossible to consider living without ideals. However, when ideas lead to ideology, that's a very dangerous thing. Ideology then leads to creating the image of an enemy, and it leads to the murder and massacre that we've seen since the beginning of time.