According to Wikipedia:
During the middle of the fourth millennium, the entire region of the Vinča Culture underwent stagnation, followed by deep crises and a decline in cultural and economic development.
What really happened to the Vinča culture? What I cited from Wikipedia doesn´t have any reference...
If there was a stagnation and crises, are there any archaeological data of an migration from the areas of the Vinča culture?
I don´t find any good books on the culture, since I only read english.