A good article came out yesterday in the New York magazine online, discussing the downfall of wearing shoes.
You Walk Wrong
I'll have more to add to this soon, as I am doing a lot of research on the function of the foot and ankle, and the effect they have on the rest of the body. I will say, however, that proper foot function is paramount from both a biomechanical and neurophysiological standpoint.
When it comes to problems with our feet and ankles, the majority of us do EVERYTHING wrong.