abstract:The mediocrity principle is the philosophical notion that "if an item is drawn at random from one of several sets or categories, it's likelier to come from the most numerous category than from any one of the less numerous categories" (Kukla 2009). The principle has been taken to suggest that there is nothing very unusual about the evolution of the Solar System, the Earth, humans, or any one nation.
The otheris the mediocrityprinciple, whichsuggests thatbecausethere is lifeonEarth, it will typically existon Earth-like planets throughout the universe.