Nearly 2000 years before Oetzi.
Farming groups organized into patrilineal clans with near-identical Y chromosomes.
They killed other men and kept the women.
A severe collapse in male genetic diversity that occurred roughly 7,000 to 5,000 years ago following the invention of agriculture
Interesting, so 5000 to 3000 BC, just about the time when tye first cities in the indus valley civilization, Sumerian and Elamite civilizations came about