An external threat that required immediate tabling or resolution of pending disputes of philosophy and real property on a global scale.
This is why alien invasion, crazed robosentience and viral zombie plague movies, video games, and novelty underwear are so consistently popular – they are the only readily understandable threats that everyone can agree might bring us together as a species or unify us without regard to race, creed, or culture.
This answer originally appeared on Quora: What would it take to give the human race “purpose” again?