Before revision: In Early Humans Cultural hitchhiking has been proposed as an explanation for a widely inferred and abrupt Y-chromosome population bottleneck across several Old World (Africa, Europe, Asia) populations around 4000-6000 BC.
After revision: In early humans Cultural hitchhiking has been proposed as an explanation for a widely inferred and abrupt Y-chromosome population bottleneck across several Old World (Africa, Europe, Asia) populations around 4000-6000 BC.