William H Calvin makes a similar argument in _The Throwing Madonna_ (and less succinctly, but more entertainingly, in _The River That Flows Uphill_). He's got a

William H Calvin makes a similar argument in _The Throwing Madonna_ (and less succinctly, but more entertainingly, in _The River That Flows Uphill_). He's got a lot to say about the evolution of hand-eye coordination and throwing as well.