I really recommend that you check out the book <i>Born to Run</i> [1] which examines barefoot running and how we've evolved.  It's been a while since I read it, but I believe it even includes a chapter about persistence hunting [2].<p>1. <a href="http://www.amazon.com/Born-Run-Hidden-Superathletes-Greatest/dp/0307266303" rel="nofollow">http://www.amazon.com/Born-Run-Hidden-Superathletes-Greatest...</a><p>2. <a href="http://en.wikipedia.org/wiki/Persistence_hunting" rel="nofollow">http://en.wikipedia.org/wiki/Persistence_hunting</a>