Evidence of mass brutality accompanied collapse of first pan-European culture

"...nasty, brutish, and short." - https://en.wikipedia.org/wiki/Leviathan_(Hobbes_book)

tldr - Anatolian/Danubian farmers settled central europe from the black sea to Paris. (The LBK pottery culture) About 5000BC a subculture developed that raided distant villages, brought people to central locations, killed and dismembered them in conjunction with ceremonial feasting. Although the LBK culture continued for several generations after that.