While the modern human — species Homo sapiens — appears in the fossil record around 200,000 years ago, evidence of the kind of "modernity" we associate with our species (like advanced tools and symbolic artifacts) took an additional 150,000 years to appear.
The key, the researchers claim, could be found in the feminized skulls that became more prevalent around that time. A rounder face in humans is associated with less testosterone, and less testosterone can mean better cooperation between individuals. Less head clubbing and more community building, basically.
One study isn't quite enough to pin the origin of humanity on. But studying how humans and apes responded to evolutionary hormonal shifts can give us insights into the origins of culture and modernity.