I can’t add anything to this, so just go read the whole darned thing: Misguided Nostalgia for Our Paleo Past
Here’s a pull-quote, if that’s what floats your boat…
To think of ourselves as misfits in our own time and of our own making flatly contradicts what we now understand about the way evolution works””namely, that rate matters. That evolution can be fast, slow, or in-between, and understanding what makes the difference is far more enlightening, and exciting, than holding our flabby modern selves up against a vision””accurate or not””of our well-muscled and harmoniously adapted ancestors.
Seriously interesting stuff, I kid you not.