Tz'utujil migrations and Diaspora

While some other cultures will spread across the world, going to different countries or just different areas, the Tz'utujil seem to stay in one spot. They have a stable economy and agriculture around Lake Atitlan and have a simple relationship with most surrounding cultures so there doesn't seem to be a need to leave. Even through the Spanish Conquest the Tz'utujil stayed firm in holding their lands.