A 3rd millennium BC tribe of the Zagros Mountains which invaded Mesopotamia c 2230 BC and brought the downfall of the Akkadian empire. Their original home was probably Luristan or Hammadan. The Gutian, or post-Akkadian, period in Mesopotamia was a time of political fragmentation (there is evidence of independent rulers in various parts of Babylonia, such as Gudea at Lagash) and it only lasted for about 40 years (till c 2130 BC) before the people of Ur-Nammu (Uruk) took over the region. The Guti, from their home in the Zagros, continued to menace the subsequent dynasties and kingdoms, but they were never able to take control of southern Mesopotamia again.