"It’s not the right English word, but it’s the closest we can come. Young Quinlans, just around adulthood, often leave their home city, usually in a group of four called a sabbat , to see the world and possibly find a new place to settle. They might start a new town, or they might just join an existing one. My guess is that the behavior evolved to keep the gene pool diverse. It’s generally mostly males that do this, although females are common enough that no one would be surprised if one of the group is female."