An established political order blocks innovation and economic development; there's too much local trust, with individuals only doing business with those they know. Look at what happened in Detroit.
Our metrics of urban neighborhood health fail to capture individual success stories, which is why we see South Central Los Angeles, which has a history of successfully encouraging social mobility, as a place with persistent poverty.
Evil needs a face and it doesn't look like your neighbor—or your child. Evil must be inhuman, other. The familiar is innocent. We let our guard down. This is part of the diversity paradox.
Globalization favors open networks, people who can do business with each other on a minimal amount of trust, and avoids closed networks, the parochial neighborhoods that only look out for their own.