Decline and end of the Cucuteni–Trypillia culture

Due partly to the fact that this took place before the written record of this region began, there have been a number of theories presented over the years to fill the gap of knowledge about how and why the end of the Cucuteni–Trypillia culture happened. These theories include invasions from various groups of people, a gradual cultural shift as more advanced societies settled in their region, and environmental collapse.