The Cactus Crossing Conundrum is an ethics and "fairness" thought experiment I wrote for you in which your moral intuitions are represented as a number between 0 and 100: Suppose there are two villages, "Smallville" and "Largeford," which are a 5-minute walk apart. There are 100 people in Smallville and 200 people in Largeford - so Largeford has twice as many people in it. According to their ancient traditions, ALL of the people in the two villages must meet once per month in one of t...