us vs. them

Competition is necessary - it's a human trait. Whether it's a Scrabble championship, a chess tournament, or a debate, it's something that obviously satisfies a need in people, even if it's in a rooting interest. Sports are great, as they involve physical prowess in addition to mental focus. Throughout history, mankind has defined itself by assuming an us vs. them mentality. Unfortunately, it often leads to war, mostly involving politics and religion. Too bad we can't limit our need to vanquish our opponents to sports and board games.