I was thinking recently about how we react to shared impending calamity (or challenge). The Allies worked together to battle a shared enemy in World War II. The Manhattan Project was an example of this (for better or worse). We worked together within the United States to reach the moon (as a challenge from Sputnik and our then adversaries in the U.S.S.R.). I am sure that if we faced a shared disaster such as a killer asteroid, we would all probably team up to nudge that rock into someone else’s orbit.