I still maintain the answer is the near total absence of accountability at the top echelons of our public institutions - a source from which decency and integrity can trickle down thru our institutions.
What's bubbling up instead is dissolving public trust and basically locking our civilization into it's declining trajectory.
Accountability needs to happen with the mayor and city council, who must keep the police chiefs accountable, because they're the ones who keep their cops accountable, but it doesn't seem to happen. Rules/laws of accountability are meaningless if not enforced.