Upon their arrival in the Fourth World, the Hopis divided and went on a series of great migrations throughout the land. Sometimes they would stop and build a town, then abandon it to continue on with the migration. They would leave their symbols behind on the rocks to show that Hopi had been there. Long the divided people wandered in groups of families, eventually forming clans named after an event or sign that a particular group received upon its journey. These clans would travel for some time as a unified community, but almost inevitably a disagreement would occur, the clan would split and each portion would go its separate way. However, as the clans traveled, they would often join together forming large groups, only to have these associations disband, and then be reformed with other clans. These alternate periods of harmonious living followed by wickedness, contention, and separation play an important part of the Hopi mythos. This pattern seemingly began in the First World and continues even into recent history.