God, imagine being the first one to have to explain to the aliens what "left" and "right" are, trying to make sense of the insensate decision to yoke ourselves to such reductive labels just to scratch that tribal itch in our brains. It almost made sense back when we killed and enslaved each other for worshiping the wrong gods, or pledging fealty to the wrong lords. But what excuse today do we still have to flatten the whole churning mass of a person's belief system into a single point on a single line? It goes so much deeper than ignorance, laziness, or abstraction.