Two potent forces power the Ebola and ISIS epidemics that the media are ignoring. They're (1) breakdown of governing authority, and (2) dissolution of "social capital" -- ties of trust and cooperation that empower individuals, families, and others to forge coalitions and tackle common problems at the community level.
At what point do mistakes aggregate into something evil? At the very least, do they prevent us from claiming the mantle of good? And, of course, it's not just the mistakes that are problematic but also the deliberate policies that, for instance, align Washington with dictators and other murderous actors.