The Forbidden Question
You can be skeptical of anything but the one true failure of humanity.
Imagine for a moment that you could understand all of the Big Problems of humanity, and nobody would have to get nailed to anything to see where we have gone wrong.
David Spero wrote a wonderful assessment of how violence affects us all, some solutions to localized problems, and the views that are effectively communicated through contemporary stories.
In all of this enlightened good work, he only missed one word that logically causes all of it: Competition.