In the mythical country of Xacandra, people experience an emotion they call revzola. Revzola is associated with particular states of arousal, and the people who experience it strongly do better in Xacandran society. When Xacandran psychologists explored nearby countries, they discovered that every culture had an emotion like revzola, though they called it by different names. In terms of the circumplex model of emotions, revzola is a emotion.