> why is every medium to large predator able to easily outrun a human?
Humans are pack animals. More importantly, pack animals with pointed sticks and fire. Ain't a predator on the planet that can take down a prepared pack of humans. Consequently, our need to outrun them is minimal.
I know this is just really semantics but are we really "pack" animals? Would the better term be "troop" as is used with some other primates? Tribe seems to say too much. What is the correct name for an early group of hunter/gatherer humans?
No dispute there.
However, I still don't buy the authors thesis. As supportive evidence, I would need to see an analysis of caloric intake/output and how this special style of running gave the species a reproductive advantage.