High-T males don't just live in a cave; they build a fortress . They domesticate wolves (dogs) to hunt better. They throw spears harder. They dig deeper mines for metals.
This created a feedback loop. The ability to produce a surge of T in response to a threat (or an opportunity) allowed early humans to take massive risks. Those who won the risks gained the status. Those with status gained the mates. Secret Testosterone Nexus Of Evolution
Testosterone wasn't the weapon. It was the that allowed the weapon to be used. The Niche Construction Loop Here is where the "nexus" gets truly secret. Evolution isn't just about genes adapting to the environment. Organisms modify their environment. High-T males don't just live in a cave;